^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2017 Hisilicon Limited, All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author: Zou Rongrong <zourongrong@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: John Garry <john.garry@huawei.com>
^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/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/logic_pio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/serial_8250.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define DRV_NAME "hisi-lpc"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * Setting this bit means each IO operation will target a different port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * address; 0 means repeated IO operations will use the same port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * such as BT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define FG_INCRADDR_LPC 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct lpc_cycle_para {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) unsigned int opflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned int csize; /* data length of each operation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct hisi_lpc_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) spinlock_t cycle_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) void __iomem *membase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct logic_pio_hwaddr *io_host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* The max IO cycle counts supported is four per operation at maximum */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define LPC_MAX_DWIDTH 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define LPC_REG_STARTUP_SIGNAL 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define LPC_REG_STARTUP_SIGNAL_START BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define LPC_REG_OP_STATUS 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define LPC_REG_OP_STATUS_IDLE BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define LPC_REG_OP_STATUS_FINISHED BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define LPC_REG_OP_LEN 0x10 /* LPC cycles count per start */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define LPC_REG_CMD 0x14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define LPC_REG_CMD_OP BIT(0) /* 0: read, 1: write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define LPC_REG_CMD_SAMEADDR BIT(3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define LPC_REG_ADDR 0x20 /* target address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define LPC_REG_WDATA 0x24 /* write FIFO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define LPC_REG_RDATA 0x28 /* read FIFO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* The minimal nanosecond interval for each query on LPC cycle status */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define LPC_NSEC_PERWAIT 100
^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) * The maximum waiting time is about 128us. It is specific for stream I/O,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * such as ins.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * The fastest IO cycle time is about 390ns, but the worst case will wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * for extra 256 lpc clocks, so (256 + 13) * 30ns = 8 us. The maximum burst
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * cycles is 16. So, the maximum waiting time is about 128us under worst
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * Choose 1300 as the maximum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define LPC_MAX_WAITCNT 1300
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /* About 10us. This is specific for single IO operations, such as inb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define LPC_PEROP_WAITCNT 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static int wait_lpc_idle(void __iomem *mbase, unsigned int waitcnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) u32 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) status = readl(mbase + LPC_REG_OP_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (status & LPC_REG_OP_STATUS_IDLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return (status & LPC_REG_OP_STATUS_FINISHED) ? 0 : -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ndelay(LPC_NSEC_PERWAIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) } while (--waitcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return -ETIME;
^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * hisi_lpc_target_in - trigger a series of LPC cycles for read operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * @lpcdev: pointer to hisi lpc device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * @para: some parameters used to control the lpc I/O operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * @addr: the lpc I/O target port address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * @buf: where the read back data is stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * @opcnt: how many I/O operations required, i.e. data width
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * Returns 0 on success, non-zero on fail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static int hisi_lpc_target_in(struct hisi_lpc_dev *lpcdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct lpc_cycle_para *para, unsigned long addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) unsigned char *buf, unsigned long opcnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) unsigned int cmd_word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) unsigned int waitcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (!buf || !opcnt || !para || !para->csize || !lpcdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) cmd_word = 0; /* IO mode, Read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) waitcnt = LPC_PEROP_WAITCNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (!(para->opflags & FG_INCRADDR_LPC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) cmd_word |= LPC_REG_CMD_SAMEADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) waitcnt = LPC_MAX_WAITCNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* whole operation must be atomic */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) spin_lock_irqsave(&lpcdev->cycle_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) writel_relaxed(opcnt, lpcdev->membase + LPC_REG_OP_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) writel_relaxed(cmd_word, lpcdev->membase + LPC_REG_CMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) writel_relaxed(addr, lpcdev->membase + LPC_REG_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) writel(LPC_REG_STARTUP_SIGNAL_START,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) lpcdev->membase + LPC_REG_STARTUP_SIGNAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* whether the operation is finished */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) ret = wait_lpc_idle(lpcdev->membase, waitcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) spin_unlock_irqrestore(&lpcdev->cycle_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) readsb(lpcdev->membase + LPC_REG_RDATA, buf, opcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) spin_unlock_irqrestore(&lpcdev->cycle_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * hisi_lpc_target_out - trigger a series of LPC cycles for write operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * @lpcdev: pointer to hisi lpc device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * @para: some parameters used to control the lpc I/O operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * @addr: the lpc I/O target port address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * @buf: where the data to be written is stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * @opcnt: how many I/O operations required, i.e. data width
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * Returns 0 on success, non-zero on fail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static int hisi_lpc_target_out(struct hisi_lpc_dev *lpcdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct lpc_cycle_para *para, unsigned long addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) const unsigned char *buf, unsigned long opcnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) unsigned int waitcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) u32 cmd_word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (!buf || !opcnt || !para || !lpcdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /* default is increasing address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) cmd_word = LPC_REG_CMD_OP; /* IO mode, write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) waitcnt = LPC_PEROP_WAITCNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (!(para->opflags & FG_INCRADDR_LPC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) cmd_word |= LPC_REG_CMD_SAMEADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) waitcnt = LPC_MAX_WAITCNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) spin_lock_irqsave(&lpcdev->cycle_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) writel_relaxed(opcnt, lpcdev->membase + LPC_REG_OP_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) writel_relaxed(cmd_word, lpcdev->membase + LPC_REG_CMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) writel_relaxed(addr, lpcdev->membase + LPC_REG_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) writesb(lpcdev->membase + LPC_REG_WDATA, buf, opcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) writel(LPC_REG_STARTUP_SIGNAL_START,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) lpcdev->membase + LPC_REG_STARTUP_SIGNAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /* whether the operation is finished */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ret = wait_lpc_idle(lpcdev->membase, waitcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) spin_unlock_irqrestore(&lpcdev->cycle_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static unsigned long hisi_lpc_pio_to_addr(struct hisi_lpc_dev *lpcdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) unsigned long pio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return pio - lpcdev->io_host->io_start + lpcdev->io_host->hw_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * hisi_lpc_comm_in - input the data in a single operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * @hostdata: pointer to the device information relevant to LPC controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * @pio: the target I/O port address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * @dwidth: the data length required to read from the target I/O port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * When success, data is returned. Otherwise, ~0 is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static u32 hisi_lpc_comm_in(void *hostdata, unsigned long pio, size_t dwidth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) struct hisi_lpc_dev *lpcdev = hostdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) struct lpc_cycle_para iopara;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) __le32 rd_data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (!lpcdev || !dwidth || dwidth > LPC_MAX_DWIDTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return ~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) addr = hisi_lpc_pio_to_addr(lpcdev, pio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) iopara.opflags = FG_INCRADDR_LPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) iopara.csize = dwidth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) ret = hisi_lpc_target_in(lpcdev, &iopara, addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) (unsigned char *)&rd_data, dwidth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return ~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) return le32_to_cpu(rd_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * hisi_lpc_comm_out - output the data in a single operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * @hostdata: pointer to the device information relevant to LPC controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * @pio: the target I/O port address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * @val: a value to be output from caller, maximum is four bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * @dwidth: the data width required writing to the target I/O port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * This function corresponds to out(b,w,l) only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static void hisi_lpc_comm_out(void *hostdata, unsigned long pio,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) u32 val, size_t dwidth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct hisi_lpc_dev *lpcdev = hostdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) struct lpc_cycle_para iopara;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) const unsigned char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) __le32 _val = cpu_to_le32(val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (!lpcdev || !dwidth || dwidth > LPC_MAX_DWIDTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) buf = (const unsigned char *)&_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) addr = hisi_lpc_pio_to_addr(lpcdev, pio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) iopara.opflags = FG_INCRADDR_LPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) iopara.csize = dwidth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) hisi_lpc_target_out(lpcdev, &iopara, addr, buf, dwidth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * hisi_lpc_comm_ins - input the data in the buffer in multiple operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * @hostdata: pointer to the device information relevant to LPC controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * @pio: the target I/O port address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * @buffer: a buffer where read/input data bytes are stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * @dwidth: the data width required writing to the target I/O port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * @count: how many data units whose length is dwidth will be read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * When success, the data read back is stored in buffer pointed by buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * Returns 0 on success, -errno otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) static u32 hisi_lpc_comm_ins(void *hostdata, unsigned long pio, void *buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) size_t dwidth, unsigned int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct hisi_lpc_dev *lpcdev = hostdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) unsigned char *buf = buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) struct lpc_cycle_para iopara;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (!lpcdev || !buf || !count || !dwidth || dwidth > LPC_MAX_DWIDTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) iopara.opflags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (dwidth > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) iopara.opflags |= FG_INCRADDR_LPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) iopara.csize = dwidth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) addr = hisi_lpc_pio_to_addr(lpcdev, pio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) ret = hisi_lpc_target_in(lpcdev, &iopara, addr, buf, dwidth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) buf += dwidth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) } while (--count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * hisi_lpc_comm_outs - output the data in the buffer in multiple operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * @hostdata: pointer to the device information relevant to LPC controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * @pio: the target I/O port address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * @buffer: a buffer where write/output data bytes are stored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * @dwidth: the data width required writing to the target I/O port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * @count: how many data units whose length is dwidth will be written
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) static void hisi_lpc_comm_outs(void *hostdata, unsigned long pio,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) const void *buffer, size_t dwidth,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) unsigned int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) struct hisi_lpc_dev *lpcdev = hostdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) struct lpc_cycle_para iopara;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) const unsigned char *buf = buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (!lpcdev || !buf || !count || !dwidth || dwidth > LPC_MAX_DWIDTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) iopara.opflags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (dwidth > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) iopara.opflags |= FG_INCRADDR_LPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) iopara.csize = dwidth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) addr = hisi_lpc_pio_to_addr(lpcdev, pio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (hisi_lpc_target_out(lpcdev, &iopara, addr, buf, dwidth))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) buf += dwidth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) } while (--count);
^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) static const struct logic_pio_host_ops hisi_lpc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) .in = hisi_lpc_comm_in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) .out = hisi_lpc_comm_out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) .ins = hisi_lpc_comm_ins,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) .outs = hisi_lpc_comm_outs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) #ifdef CONFIG_ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static int hisi_lpc_acpi_xlat_io_res(struct acpi_device *adev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) struct acpi_device *host,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct resource *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) unsigned long sys_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) resource_size_t len = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) sys_port = logic_pio_trans_hwaddr(&host->fwnode, res->start, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (sys_port == ~0UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) res->start = sys_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) res->end = sys_port + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * Released firmware describes the IO port max address as 0x3fff, which is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * the max host bus address. Fixup to a proper range. This will probably
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) * never be fixed in firmware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) static void hisi_lpc_acpi_fixup_child_resource(struct device *hostdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct resource *r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (r->end != 0x3fff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (r->start == 0xe4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) r->end = 0xe4 + 0x04 - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) else if (r->start == 0x2f8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) r->end = 0x2f8 + 0x08 - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) dev_warn(hostdev, "unrecognised resource %pR to fixup, ignoring\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^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) * hisi_lpc_acpi_set_io_res - set the resources for a child
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) * @child: the device node to be updated the I/O resource
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * @hostdev: the device node associated with host controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) * @res: double pointer to be set to the address of translated resources
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) * @num_res: pointer to variable to hold the number of translated resources
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) * Returns 0 when successful, and a negative value for failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) * For a given host controller, each child device will have an associated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) * host-relative address resource. This function will return the translated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) * logical PIO addresses for each child devices resources.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) static int hisi_lpc_acpi_set_io_res(struct device *child,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) struct device *hostdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) const struct resource **res, int *num_res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) struct acpi_device *adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct acpi_device *host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) struct resource_entry *rentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) LIST_HEAD(resource_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) struct resource *resources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (!child || !hostdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) host = to_acpi_device(hostdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) adev = to_acpi_device(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (!adev->status.present) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) dev_dbg(child, "device is not present\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (acpi_device_enumerated(adev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) dev_dbg(child, "has been enumerated\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * The following code segment to retrieve the resources is common to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * acpi_create_platform_device(), so consider a common helper function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * in future.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) count = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (count <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) dev_dbg(child, "failed to get resources\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return count ? count : -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) resources = devm_kcalloc(hostdev, count, sizeof(*resources),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (!resources) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) dev_warn(hostdev, "could not allocate memory for %d resources\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) acpi_dev_free_resource_list(&resource_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) list_for_each_entry(rentry, &resource_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) resources[count] = *rentry->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) hisi_lpc_acpi_fixup_child_resource(hostdev, &resources[count]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) acpi_dev_free_resource_list(&resource_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /* translate the I/O resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) for (i = 0; i < count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (!(resources[i].flags & IORESOURCE_IO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) ret = hisi_lpc_acpi_xlat_io_res(adev, host, &resources[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) dev_err(child, "translate IO range %pR failed (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) &resources[i], ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) *res = resources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) *num_res = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) static int hisi_lpc_acpi_remove_subdev(struct device *dev, void *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) platform_device_unregister(to_platform_device(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return 0;
^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) struct hisi_lpc_acpi_cell {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) const char *hid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) void *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) size_t pdata_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) static void hisi_lpc_acpi_remove(struct device *hostdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) struct acpi_device *adev = ACPI_COMPANION(hostdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) struct acpi_device *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) device_for_each_child(hostdev, NULL, hisi_lpc_acpi_remove_subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) list_for_each_entry(child, &adev->children, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) acpi_device_clear_enumerated(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) * hisi_lpc_acpi_probe - probe children for ACPI FW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) * @hostdev: LPC host device pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) * Returns 0 when successful, and a negative value for failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * Create a platform device per child, fixing up the resources
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) * from bus addresses to Logical PIO addresses.
^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) static int hisi_lpc_acpi_probe(struct device *hostdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) struct acpi_device *adev = ACPI_COMPANION(hostdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) struct acpi_device *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) /* Only consider the children of the host */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) list_for_each_entry(child, &adev->children, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) const char *hid = acpi_device_hid(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) const struct hisi_lpc_acpi_cell *cell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) struct platform_device *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) const struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) bool found = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) int num_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) ret = hisi_lpc_acpi_set_io_res(&child->dev, &adev->dev, &res,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) &num_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) dev_warn(hostdev, "set resource fail (%d)\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) cell = (struct hisi_lpc_acpi_cell []){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) /* ipmi */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) .hid = "IPI0001",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) .name = "hisi-lpc-ipmi",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) /* 8250-compatible uart */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) .hid = "HISI1031",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) .name = "serial8250",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) .pdata = (struct plat_serial8250_port []) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) .iobase = res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) .uartclk = 1843200,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) .iotype = UPIO_PORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) .flags = UPF_BOOT_AUTOCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) },
^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) .pdata_size = 2 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) sizeof(struct plat_serial8250_port),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) for (; cell && cell->name; cell++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) if (!strcmp(cell->hid, hid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) found = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) if (!found) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) dev_warn(hostdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) "could not find cell for child device (%s), discarding\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) hid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) pdev = platform_device_alloc(cell->name, PLATFORM_DEVID_AUTO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) if (!pdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) pdev->dev.parent = hostdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) ACPI_COMPANION_SET(&pdev->dev, child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) ret = platform_device_add_resources(pdev, res, num_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) ret = platform_device_add_data(pdev, cell->pdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) cell->pdata_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) ret = platform_device_add(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) acpi_device_set_enumerated(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) hisi_lpc_acpi_remove(hostdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) static const struct acpi_device_id hisi_lpc_acpi_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) {"HISI0191"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) static int hisi_lpc_acpi_probe(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) static void hisi_lpc_acpi_remove(struct device *hostdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) #endif // CONFIG_ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) * hisi_lpc_probe - the probe callback function for hisi lpc host,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) * will finish all the initialization.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * @pdev: the platform device corresponding to hisi lpc host
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) * Returns 0 on success, non-zero on fail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) static int hisi_lpc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) struct acpi_device *acpi_device = ACPI_COMPANION(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) struct logic_pio_hwaddr *range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) struct hisi_lpc_dev *lpcdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) resource_size_t io_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) lpcdev = devm_kzalloc(dev, sizeof(*lpcdev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) if (!lpcdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) spin_lock_init(&lpcdev->cycle_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) lpcdev->membase = devm_ioremap_resource(dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) if (IS_ERR(lpcdev->membase))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) return PTR_ERR(lpcdev->membase);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) if (!range)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) range->fwnode = dev->fwnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) range->flags = LOGIC_PIO_INDIRECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) range->size = PIO_INDIRECT_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) range->hostdata = lpcdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) range->ops = &hisi_lpc_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) lpcdev->io_host = range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) ret = logic_pio_register_range(range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) dev_err(dev, "register IO range failed (%d)!\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) /* register the LPC host PIO resources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) if (acpi_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) ret = hisi_lpc_acpi_probe(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) logic_pio_unregister_range(range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) dev_set_drvdata(dev, lpcdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) io_end = lpcdev->io_host->io_start + lpcdev->io_host->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) dev_info(dev, "registered range [%pa - %pa]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) &lpcdev->io_host->io_start, &io_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) static int hisi_lpc_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) struct acpi_device *acpi_device = ACPI_COMPANION(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) struct hisi_lpc_dev *lpcdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) struct logic_pio_hwaddr *range = lpcdev->io_host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) if (acpi_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) hisi_lpc_acpi_remove(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) of_platform_depopulate(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) logic_pio_unregister_range(range);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) static const struct of_device_id hisi_lpc_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) { .compatible = "hisilicon,hip06-lpc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) { .compatible = "hisilicon,hip07-lpc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) static struct platform_driver hisi_lpc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) .name = DRV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) .of_match_table = hisi_lpc_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) .acpi_match_table = ACPI_PTR(hisi_lpc_acpi_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) .probe = hisi_lpc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) .remove = hisi_lpc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) builtin_platform_driver(hisi_lpc_driver);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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