^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * PS3 virtual uart
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006 Sony Computer Entertainment Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright 2006 Sony Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/ps3.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/firmware.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/lv1call.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "vuart.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) MODULE_AUTHOR("Sony Corporation");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) MODULE_DESCRIPTION("PS3 vuart");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * vuart - An inter-partition data link service.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * port 0: PS3 AV Settings.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * port 2: PS3 System Manager.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * The vuart provides a bi-directional byte stream data link between logical
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * partitions. Its primary role is as a communications link between the guest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * OS and the system policy module. The current HV does not support any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * connections other than those listed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) enum {PORT_COUNT = 3,};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) enum vuart_param {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) PARAM_TX_TRIGGER = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) PARAM_RX_TRIGGER = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) PARAM_INTERRUPT_MASK = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) PARAM_RX_BUF_SIZE = 3, /* read only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) PARAM_RX_BYTES = 4, /* read only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) PARAM_TX_BUF_SIZE = 5, /* read only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) PARAM_TX_BYTES = 6, /* read only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) PARAM_INTERRUPT_STATUS = 7, /* read only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) enum vuart_interrupt_bit {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) INTERRUPT_BIT_TX = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) INTERRUPT_BIT_RX = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) INTERRUPT_BIT_DISCONNECT = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) enum vuart_interrupt_mask {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) INTERRUPT_MASK_TX = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) INTERRUPT_MASK_RX = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) INTERRUPT_MASK_DISCONNECT = 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * struct ps3_vuart_port_priv - private vuart device data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct ps3_vuart_port_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) u64 interrupt_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct list_head head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) } tx_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct ps3_vuart_work work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) unsigned long bytes_held;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct list_head head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) } rx_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct ps3_vuart_stats stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static struct ps3_vuart_port_priv *to_port_priv(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) BUG_ON(!dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) BUG_ON(!dev->driver_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return (struct ps3_vuart_port_priv *)dev->driver_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * struct ports_bmp - bitmap indicating ports needing service.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * A 256 bit read only bitmap indicating ports needing service. Do not write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * to these bits. Must not cross a page boundary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct ports_bmp {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) u64 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) u64 unused[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) } __attribute__((aligned(32)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #define dump_ports_bmp(_b) _dump_ports_bmp(_b, __func__, __LINE__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static void __maybe_unused _dump_ports_bmp(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) const struct ports_bmp *bmp, const char *func, int line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) pr_debug("%s:%d: ports_bmp: %016llxh\n", func, line, bmp->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define dump_port_params(_b) _dump_port_params(_b, __func__, __LINE__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static void __maybe_unused _dump_port_params(unsigned int port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) const char *func, int line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #if defined(DEBUG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static const char *strings[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) "tx_trigger ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) "rx_trigger ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) "interrupt_mask ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) "rx_buf_size ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) "rx_bytes ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) "tx_buf_size ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) "tx_bytes ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) "interrupt_status",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) u64 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) for (i = 0; i < ARRAY_SIZE(strings); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) result = lv1_get_virtual_uart_param(port_number, i, &value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) pr_debug("%s:%d: port_%u: %s failed: %s\n", func, line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) port_number, strings[i], ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) pr_debug("%s:%d: port_%u: %s = %lxh\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) func, line, port_number, strings[i], value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) int ps3_vuart_get_triggers(struct ps3_system_bus_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct vuart_triggers *trig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) u64 size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) u64 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) u64 tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) result = lv1_get_virtual_uart_param(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) PARAM_TX_TRIGGER, &tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) trig->tx = tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) result = lv1_get_virtual_uart_param(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) PARAM_RX_BUF_SIZE, &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) result = lv1_get_virtual_uart_param(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) PARAM_RX_TRIGGER, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) trig->rx = size - val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) dev_dbg(&dev->core, "%s:%d: tx %lxh, rx %lxh\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) trig->tx, trig->rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) int ps3_vuart_set_triggers(struct ps3_system_bus_device *dev, unsigned int tx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) unsigned int rx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) u64 size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) result = lv1_set_virtual_uart_param(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) PARAM_TX_TRIGGER, tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) dev_dbg(&dev->core, "%s:%d: tx_trigger failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) result = lv1_get_virtual_uart_param(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) PARAM_RX_BUF_SIZE, &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) dev_dbg(&dev->core, "%s:%d: tx_buf_size failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) result = lv1_set_virtual_uart_param(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) PARAM_RX_TRIGGER, size - rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) dev_dbg(&dev->core, "%s:%d: rx_trigger failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) dev_dbg(&dev->core, "%s:%d: tx %xh, rx %xh\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) tx, rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static int ps3_vuart_get_rx_bytes_waiting(struct ps3_system_bus_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) u64 *bytes_waiting)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) result = lv1_get_virtual_uart_param(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) PARAM_RX_BYTES, bytes_waiting);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) dev_dbg(&dev->core, "%s:%d: rx_bytes failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) dev_dbg(&dev->core, "%s:%d: %llxh\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) *bytes_waiting);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * ps3_vuart_set_interrupt_mask - Enable/disable the port interrupt sources.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * @dev: The struct ps3_system_bus_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * @bmp: Logical OR of enum vuart_interrupt_mask values. A zero bit disables.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static int ps3_vuart_set_interrupt_mask(struct ps3_system_bus_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) unsigned long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) dev_dbg(&dev->core, "%s:%d: %lxh\n", __func__, __LINE__, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) priv->interrupt_mask = mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) result = lv1_set_virtual_uart_param(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) PARAM_INTERRUPT_MASK, priv->interrupt_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) dev_dbg(&dev->core, "%s:%d: interrupt_mask failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) static int ps3_vuart_get_interrupt_status(struct ps3_system_bus_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) unsigned long *status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) u64 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) result = lv1_get_virtual_uart_param(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) PARAM_INTERRUPT_STATUS, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) dev_dbg(&dev->core, "%s:%d: interrupt_status failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) *status = tmp & priv->interrupt_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) dev_dbg(&dev->core, "%s:%d: m %llxh, s %llxh, m&s %lxh\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) __func__, __LINE__, priv->interrupt_mask, tmp, *status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) int ps3_vuart_enable_interrupt_tx(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) return (priv->interrupt_mask & INTERRUPT_MASK_TX) ? 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) : ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) | INTERRUPT_MASK_TX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) int ps3_vuart_enable_interrupt_rx(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return (priv->interrupt_mask & INTERRUPT_MASK_RX) ? 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) : ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) | INTERRUPT_MASK_RX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) int ps3_vuart_enable_interrupt_disconnect(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) return (priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT) ? 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) : ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) | INTERRUPT_MASK_DISCONNECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) int ps3_vuart_disable_interrupt_tx(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return (priv->interrupt_mask & INTERRUPT_MASK_TX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) ? ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) & ~INTERRUPT_MASK_TX) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) int ps3_vuart_disable_interrupt_rx(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return (priv->interrupt_mask & INTERRUPT_MASK_RX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ? ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) & ~INTERRUPT_MASK_RX) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) int ps3_vuart_disable_interrupt_disconnect(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) return (priv->interrupt_mask & INTERRUPT_MASK_DISCONNECT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) ? ps3_vuart_set_interrupt_mask(dev, priv->interrupt_mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) & ~INTERRUPT_MASK_DISCONNECT) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) * ps3_vuart_raw_write - Low level write helper.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) * @dev: The struct ps3_system_bus_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * Do not call ps3_vuart_raw_write directly, use ps3_vuart_write.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) static int ps3_vuart_raw_write(struct ps3_system_bus_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) const void *buf, unsigned int bytes, u64 *bytes_written)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) result = lv1_write_virtual_uart(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) dev_dbg(&dev->core, "%s:%d: lv1_write_virtual_uart failed: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) "%s\n", __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) priv->stats.bytes_written += *bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) dev_dbg(&dev->core, "%s:%d: wrote %llxh/%xh=>%lxh\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) *bytes_written, bytes, priv->stats.bytes_written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * ps3_vuart_raw_read - Low level read helper.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * @dev: The struct ps3_system_bus_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * Do not call ps3_vuart_raw_read directly, use ps3_vuart_read.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) static int ps3_vuart_raw_read(struct ps3_system_bus_device *dev, void *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) unsigned int bytes, u64 *bytes_read)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) result = lv1_read_virtual_uart(dev->port_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) ps3_mm_phys_to_lpar(__pa(buf)), bytes, bytes_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) dev_dbg(&dev->core, "%s:%d: lv1_read_virtual_uart failed: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) __func__, __LINE__, ps3_result(result));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) priv->stats.bytes_read += *bytes_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) dev_dbg(&dev->core, "%s:%d: read %llxh/%xh=>%lxh\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) *bytes_read, bytes, priv->stats.bytes_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * ps3_vuart_clear_rx_bytes - Discard bytes received.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * @dev: The struct ps3_system_bus_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * @bytes: Max byte count to discard, zero = all pending.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * Used to clear pending rx interrupt source. Will not block.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) void ps3_vuart_clear_rx_bytes(struct ps3_system_bus_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) unsigned int bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) u64 bytes_waiting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) void *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes_waiting);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) BUG_ON(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) bytes = bytes ? min(bytes, (unsigned int)bytes_waiting) : bytes_waiting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) dev_dbg(&dev->core, "%s:%d: %u\n", __func__, __LINE__, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) if (!bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) /* Add some extra space for recently arrived data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) bytes += 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) tmp = kmalloc(bytes, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (!tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) ps3_vuart_raw_read(dev, tmp, bytes, &bytes_waiting);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) kfree(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) /* Don't include these bytes in the stats. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) priv->stats.bytes_read -= bytes_waiting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) EXPORT_SYMBOL_GPL(ps3_vuart_clear_rx_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * struct list_buffer - An element for a port device fifo buffer list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) struct list_buffer {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) struct list_head link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) const unsigned char *head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) const unsigned char *tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) unsigned long dbg_number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) unsigned char data[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) * ps3_vuart_write - the entry point for writing data to a port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) * @dev: The struct ps3_system_bus_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) * If the port is idle on entry as much of the incoming data is written to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) * the port as the port will accept. Otherwise a list buffer is created
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) * and any remaning incoming data is copied to that buffer. The buffer is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * then enqueued for transmision via the transmit interrupt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) int ps3_vuart_write(struct ps3_system_bus_device *dev, const void *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) unsigned int bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) static unsigned long dbg_number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) struct list_buffer *lb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) bytes, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) spin_lock_irqsave(&priv->tx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (list_empty(&priv->tx_list.head)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) u64 bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) result = ps3_vuart_raw_write(dev, buf, bytes, &bytes_written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) spin_unlock_irqrestore(&priv->tx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) dev_dbg(&dev->core,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) "%s:%d: ps3_vuart_raw_write failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (bytes_written == bytes) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) dev_dbg(&dev->core, "%s:%d: wrote %xh bytes\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) __func__, __LINE__, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) bytes -= bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) buf += bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) spin_unlock_irqrestore(&priv->tx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (!lb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) memcpy(lb->data, buf, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) lb->head = lb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) lb->tail = lb->data + bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) lb->dbg_number = ++dbg_number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) spin_lock_irqsave(&priv->tx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) list_add_tail(&lb->link, &priv->tx_list.head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) ps3_vuart_enable_interrupt_tx(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) spin_unlock_irqrestore(&priv->tx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) dev_dbg(&dev->core, "%s:%d: queued buf_%lu, %xh bytes\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) __func__, __LINE__, lb->dbg_number, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) EXPORT_SYMBOL_GPL(ps3_vuart_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) * ps3_vuart_queue_rx_bytes - Queue waiting bytes into the buffer list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) * @dev: The struct ps3_system_bus_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) * @bytes_queued: Number of bytes queued to the buffer list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) * Must be called with priv->rx_list.lock held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) static int ps3_vuart_queue_rx_bytes(struct ps3_system_bus_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) u64 *bytes_queued)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) static unsigned long dbg_number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) struct list_buffer *lb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) u64 bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) *bytes_queued = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) result = ps3_vuart_get_rx_bytes_waiting(dev, &bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) BUG_ON(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) if (!bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) /* Add some extra space for recently arrived data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) bytes += 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) lb = kmalloc(sizeof(struct list_buffer) + bytes, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) if (!lb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) ps3_vuart_raw_read(dev, lb->data, bytes, &bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) lb->head = lb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) lb->tail = lb->data + bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) lb->dbg_number = ++dbg_number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) list_add_tail(&lb->link, &priv->rx_list.head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) priv->rx_list.bytes_held += bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) dev_dbg(&dev->core, "%s:%d: buf_%lu: queued %llxh bytes\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) __func__, __LINE__, lb->dbg_number, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) *bytes_queued = bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) * ps3_vuart_read - The entry point for reading data from a port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) * Queue data waiting at the port, and if enough bytes to satisfy the request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * are held in the buffer list those bytes are dequeued and copied to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * caller's buffer. Emptied list buffers are retiered. If the request cannot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) * be statified by bytes held in the list buffers -EAGAIN is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) int ps3_vuart_read(struct ps3_system_bus_device *dev, void *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) unsigned int bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) struct list_buffer *lb, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) unsigned long bytes_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) dev_dbg(&dev->core, "%s:%d: %u(%xh) bytes\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) bytes, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) spin_lock_irqsave(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) /* Queue rx bytes here for polled reads. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) while (priv->rx_list.bytes_held < bytes) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) u64 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) result = ps3_vuart_queue_rx_bytes(dev, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) if (result || !tmp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) dev_dbg(&dev->core, "%s:%d: starved for %lxh bytes\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) bytes - priv->rx_list.bytes_held);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) spin_unlock_irqrestore(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) list_for_each_entry_safe(lb, n, &priv->rx_list.head, link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) bytes_read = min((unsigned int)(lb->tail - lb->head), bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) memcpy(buf, lb->head, bytes_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) buf += bytes_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) bytes -= bytes_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) priv->rx_list.bytes_held -= bytes_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) if (bytes_read < lb->tail - lb->head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) lb->head += bytes_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) dev_dbg(&dev->core, "%s:%d: buf_%lu: dequeued %lxh "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) "bytes\n", __func__, __LINE__, lb->dbg_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) bytes_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) spin_unlock_irqrestore(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) dev_dbg(&dev->core, "%s:%d: buf_%lu: free, dequeued %lxh "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) "bytes\n", __func__, __LINE__, lb->dbg_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) bytes_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) list_del(&lb->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) kfree(lb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) spin_unlock_irqrestore(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) EXPORT_SYMBOL_GPL(ps3_vuart_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) * ps3_vuart_work - Asynchronous read handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) static void ps3_vuart_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) struct ps3_system_bus_device *dev =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) ps3_vuart_work_to_system_bus_dev(work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) struct ps3_vuart_port_driver *drv =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) ps3_system_bus_dev_to_vuart_drv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) BUG_ON(!drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) drv->work(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) int ps3_vuart_read_async(struct ps3_system_bus_device *dev, unsigned int bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) if (priv->rx_list.work.trigger) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) dev_dbg(&dev->core, "%s:%d: warning, multiple calls\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) BUG_ON(!bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) spin_lock_irqsave(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) if (priv->rx_list.bytes_held >= bytes) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) dev_dbg(&dev->core, "%s:%d: schedule_work %xh bytes\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) __func__, __LINE__, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) schedule_work(&priv->rx_list.work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) spin_unlock_irqrestore(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) priv->rx_list.work.trigger = bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) spin_unlock_irqrestore(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) dev_dbg(&dev->core, "%s:%d: waiting for %u(%xh) bytes\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) __LINE__, bytes, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) EXPORT_SYMBOL_GPL(ps3_vuart_read_async);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) void ps3_vuart_cancel_async(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) to_port_priv(dev)->rx_list.work.trigger = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) EXPORT_SYMBOL_GPL(ps3_vuart_cancel_async);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) * ps3_vuart_handle_interrupt_tx - third stage transmit interrupt handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) * Services the transmit interrupt for the port. Writes as much data from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) * buffer list as the port will accept. Retires any emptied list buffers and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) * adjusts the final list buffer state for a partial write.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) static int ps3_vuart_handle_interrupt_tx(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) struct list_buffer *lb, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) unsigned long bytes_total = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) spin_lock_irqsave(&priv->tx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) list_for_each_entry_safe(lb, n, &priv->tx_list.head, link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) u64 bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) result = ps3_vuart_raw_write(dev, lb->head, lb->tail - lb->head,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) &bytes_written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) dev_dbg(&dev->core,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) "%s:%d: ps3_vuart_raw_write failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) bytes_total += bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (bytes_written < lb->tail - lb->head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) lb->head += bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) dev_dbg(&dev->core,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) "%s:%d cleared buf_%lu, %llxh bytes\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) __func__, __LINE__, lb->dbg_number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) bytes_written);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) goto port_full;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) dev_dbg(&dev->core, "%s:%d free buf_%lu\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) lb->dbg_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) list_del(&lb->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) kfree(lb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) ps3_vuart_disable_interrupt_tx(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) port_full:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) spin_unlock_irqrestore(&priv->tx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) dev_dbg(&dev->core, "%s:%d wrote %lxh bytes total\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) __func__, __LINE__, bytes_total);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) * ps3_vuart_handle_interrupt_rx - third stage receive interrupt handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) * Services the receive interrupt for the port. Creates a list buffer and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) * copies all waiting port data to that buffer and enqueues the buffer in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) * buffer list. Buffer list data is dequeued via ps3_vuart_read.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) static int ps3_vuart_handle_interrupt_rx(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) u64 bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) spin_lock_irqsave(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) result = ps3_vuart_queue_rx_bytes(dev, &bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) spin_unlock_irqrestore(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) if (priv->rx_list.work.trigger && priv->rx_list.bytes_held
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) >= priv->rx_list.work.trigger) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) dev_dbg(&dev->core, "%s:%d: schedule_work %lxh bytes\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) __func__, __LINE__, priv->rx_list.work.trigger);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) priv->rx_list.work.trigger = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) schedule_work(&priv->rx_list.work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) spin_unlock_irqrestore(&priv->rx_list.lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) static int ps3_vuart_handle_interrupt_disconnect(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) BUG_ON("no support");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) * ps3_vuart_handle_port_interrupt - second stage interrupt handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) * Services any pending interrupt types for the port. Passes control to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) * third stage type specific interrupt handler. Returns control to the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) * stage handler after one iteration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) static int ps3_vuart_handle_port_interrupt(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) unsigned long status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) result = ps3_vuart_get_interrupt_status(dev, &status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) dev_dbg(&dev->core, "%s:%d: status: %lxh\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) if (status & INTERRUPT_MASK_DISCONNECT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) priv->stats.disconnect_interrupts++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) result = ps3_vuart_handle_interrupt_disconnect(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) ps3_vuart_disable_interrupt_disconnect(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) if (status & INTERRUPT_MASK_TX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) priv->stats.tx_interrupts++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) result = ps3_vuart_handle_interrupt_tx(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) ps3_vuart_disable_interrupt_tx(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) if (status & INTERRUPT_MASK_RX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) priv->stats.rx_interrupts++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) result = ps3_vuart_handle_interrupt_rx(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) ps3_vuart_disable_interrupt_rx(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) static struct vuart_bus_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) struct ports_bmp *bmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) unsigned int virq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) struct mutex probe_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) int use_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) struct ps3_system_bus_device *devices[PORT_COUNT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) } vuart_bus_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) * ps3_vuart_irq_handler - first stage interrupt handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) * Loops finding any interrupting port and its associated instance data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) * Passes control to the second stage port specific interrupt handler. Loops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) * until all outstanding interrupts are serviced.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) static irqreturn_t ps3_vuart_irq_handler(int irq, void *_private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) struct vuart_bus_priv *bus_priv = _private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) BUG_ON(!bus_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) unsigned int port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) dump_ports_bmp(bus_priv->bmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) port = (BITS_PER_LONG - 1) - __ilog2(bus_priv->bmp->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) if (port == BITS_PER_LONG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) BUG_ON(port >= PORT_COUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) BUG_ON(!bus_priv->devices[port]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) ps3_vuart_handle_port_interrupt(bus_priv->devices[port]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) static int ps3_vuart_bus_interrupt_get(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) pr_debug(" -> %s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) vuart_bus_priv.use_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) BUG_ON(vuart_bus_priv.use_count > 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) if (vuart_bus_priv.use_count != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) BUG_ON(vuart_bus_priv.bmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) vuart_bus_priv.bmp = kzalloc(sizeof(struct ports_bmp), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) if (!vuart_bus_priv.bmp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) result = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) goto fail_bmp_malloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) result = ps3_vuart_irq_setup(PS3_BINDING_CPU_ANY, vuart_bus_priv.bmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) &vuart_bus_priv.virq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) pr_debug("%s:%d: ps3_vuart_irq_setup failed (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) __func__, __LINE__, result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) result = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) goto fail_alloc_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) result = request_irq(vuart_bus_priv.virq, ps3_vuart_irq_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) 0, "vuart", &vuart_bus_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) pr_debug("%s:%d: request_irq failed (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) __func__, __LINE__, result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) goto fail_request_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) pr_debug(" <- %s:%d: ok\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) fail_request_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) ps3_vuart_irq_destroy(vuart_bus_priv.virq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) vuart_bus_priv.virq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) fail_alloc_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) kfree(vuart_bus_priv.bmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) vuart_bus_priv.bmp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) fail_bmp_malloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) vuart_bus_priv.use_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) pr_debug(" <- %s:%d: failed\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) static int ps3_vuart_bus_interrupt_put(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) pr_debug(" -> %s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) vuart_bus_priv.use_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) BUG_ON(vuart_bus_priv.use_count < 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) if (vuart_bus_priv.use_count != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) free_irq(vuart_bus_priv.virq, &vuart_bus_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) ps3_vuart_irq_destroy(vuart_bus_priv.virq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) vuart_bus_priv.virq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) kfree(vuart_bus_priv.bmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) vuart_bus_priv.bmp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) pr_debug(" <- %s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) static int ps3_vuart_probe(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) struct ps3_vuart_port_driver *drv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) struct ps3_vuart_port_priv *priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) drv = ps3_system_bus_dev_to_vuart_drv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) BUG_ON(!drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) dev_dbg(&dev->core, "%s:%d: (%s)\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) drv->core.core.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) if (dev->port_number >= PORT_COUNT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) mutex_lock(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) result = ps3_vuart_bus_interrupt_get();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) goto fail_setup_interrupt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) if (vuart_bus_priv.devices[dev->port_number]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) dev_dbg(&dev->core, "%s:%d: port busy (%d)\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) __LINE__, dev->port_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) result = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) goto fail_busy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) vuart_bus_priv.devices[dev->port_number] = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) /* Setup dev->driver_priv. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) dev->driver_priv = kzalloc(sizeof(struct ps3_vuart_port_priv),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) if (!dev->driver_priv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) result = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) goto fail_dev_malloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) INIT_LIST_HEAD(&priv->tx_list.head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) spin_lock_init(&priv->tx_list.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) INIT_LIST_HEAD(&priv->rx_list.head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) spin_lock_init(&priv->rx_list.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) INIT_WORK(&priv->rx_list.work.work, ps3_vuart_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) priv->rx_list.work.trigger = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) priv->rx_list.work.dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) /* clear stale pending interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) ps3_vuart_clear_rx_bytes(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) ps3_vuart_set_interrupt_mask(dev, INTERRUPT_MASK_RX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) ps3_vuart_set_triggers(dev, 1, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) if (drv->probe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) result = drv->probe(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) dev_info(&dev->core, "%s:%d: no probe method\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) dev_dbg(&dev->core, "%s:%d: drv->probe failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) goto fail_probe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) mutex_unlock(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) fail_probe:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) ps3_vuart_set_interrupt_mask(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) kfree(dev->driver_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) dev->driver_priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) fail_dev_malloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) vuart_bus_priv.devices[dev->port_number] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) fail_busy:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) ps3_vuart_bus_interrupt_put();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) fail_setup_interrupt:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) mutex_unlock(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) dev_dbg(&dev->core, "%s:%d: failed\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) * ps3_vuart_cleanup - common cleanup helper.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) * @dev: The struct ps3_system_bus_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) * Cleans interrupts and HV resources. Must be called with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) * vuart_bus_priv.probe_mutex held. Used by ps3_vuart_remove and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) * ps3_vuart_shutdown. After this call, polled reading will still work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) static int ps3_vuart_cleanup(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) ps3_vuart_cancel_async(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) ps3_vuart_set_interrupt_mask(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) ps3_vuart_bus_interrupt_put();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) * ps3_vuart_remove - Completely clean the device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) * @dev: The struct ps3_system_bus_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) * Cleans all memory, interrupts and HV resources. After this call the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) * device can no longer be used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) static int ps3_vuart_remove(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) struct ps3_vuart_port_priv *priv = to_port_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) struct ps3_vuart_port_driver *drv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) BUG_ON(!dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) mutex_lock(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) dev->match_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) if (!dev->core.driver) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) mutex_unlock(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) drv = ps3_system_bus_dev_to_vuart_drv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) BUG_ON(!drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) if (drv->remove) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) drv->remove(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) dev_dbg(&dev->core, "%s:%d: no remove method\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) ps3_vuart_cleanup(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) vuart_bus_priv.devices[dev->port_number] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) kfree(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) mutex_unlock(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) * ps3_vuart_shutdown - Cleans interrupts and HV resources.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) * @dev: The struct ps3_system_bus_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) * Cleans interrupts and HV resources. After this call the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) * device can still be used in polling mode. This behavior required
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) * by sys-manager to be able to complete the device power operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) * sequence.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) static int ps3_vuart_shutdown(struct ps3_system_bus_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) struct ps3_vuart_port_driver *drv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) BUG_ON(!dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) mutex_lock(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) dev->match_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) if (!dev->core.driver) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) mutex_unlock(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) drv = ps3_system_bus_dev_to_vuart_drv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) BUG_ON(!drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) if (drv->shutdown)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) drv->shutdown(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) else if (drv->remove) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) dev_dbg(&dev->core, "%s:%d: no shutdown, calling remove\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) drv->remove(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) dev_dbg(&dev->core, "%s:%d: no shutdown method\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) ps3_vuart_cleanup(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) mutex_unlock(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) static int __init ps3_vuart_bus_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) pr_debug("%s:%d:\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) mutex_init(&vuart_bus_priv.probe_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) static void __exit ps3_vuart_bus_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) pr_debug("%s:%d:\n", __func__, __LINE__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) core_initcall(ps3_vuart_bus_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) module_exit(ps3_vuart_bus_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) * ps3_vuart_port_driver_register - Add a vuart port device driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) int ps3_vuart_port_driver_register(struct ps3_vuart_port_driver *drv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) pr_debug("%s:%d: (%s)\n", __func__, __LINE__, drv->core.core.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) BUG_ON(!drv->core.match_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) BUG_ON(!drv->core.core.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) drv->core.probe = ps3_vuart_probe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) drv->core.remove = ps3_vuart_remove;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) drv->core.shutdown = ps3_vuart_shutdown;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) result = ps3_system_bus_driver_register(&drv->core);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) * ps3_vuart_port_driver_unregister - Remove a vuart port device driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) void ps3_vuart_port_driver_unregister(struct ps3_vuart_port_driver *drv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) pr_debug("%s:%d: (%s)\n", __func__, __LINE__, drv->core.core.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) ps3_system_bus_driver_unregister(&drv->core);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) EXPORT_SYMBOL_GPL(ps3_vuart_port_driver_unregister);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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