^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) * Shared Transport Line discipline driver Core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Init Manager module responsible for GPIO control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * and firmware download
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2009-2010 Texas Instruments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Pavan Savoy <pavan_savoy@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define pr_fmt(fmt) "(stk) :" fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/firmware.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/ti_wilink_st.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define MAX_ST_DEVICES 3 /* Imagine 1 on each UART for now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static struct platform_device *st_kim_devices[MAX_ST_DEVICES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /**********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /* internal functions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * st_get_plat_device -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * function which returns the reference to the platform device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * requested by id. As of now only 1 such device exists (id=0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * the context requesting for reference can get the id to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * requested by a. The protocol driver which is registering or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * b. the tty device which is opened.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static struct platform_device *st_get_plat_device(int id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return st_kim_devices[id];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * validate_firmware_response -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * function to return whether the firmware response was proper
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * in case of error don't complete so that waiting for proper
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * response times out
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static void validate_firmware_response(struct kim_data_s *kim_gdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct sk_buff *skb = kim_gdata->rx_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * these magic numbers are the position in the response buffer which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * allows us to distinguish whether the response is for the read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * version info. command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (skb->data[2] == 0x01 && skb->data[3] == 0x01 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) skb->data[4] == 0x10 && skb->data[5] == 0x00) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /* fw version response */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) memcpy(kim_gdata->resp_buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) kim_gdata->rx_skb->data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) kim_gdata->rx_skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) kim_gdata->rx_state = ST_W4_PACKET_TYPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) kim_gdata->rx_skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) kim_gdata->rx_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) } else if (unlikely(skb->data[5] != 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) pr_err("no proper response during fw download");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) pr_err("data6 %x", skb->data[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return; /* keep waiting for the proper response */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /* becos of all the script being downloaded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) complete_all(&kim_gdata->kim_rcvd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * check for data len received inside kim_int_recv
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * most often hit the last case to update state to waiting for data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static inline int kim_check_data_len(struct kim_data_s *kim_gdata, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) register int room = skb_tailroom(kim_gdata->rx_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) pr_debug("len %d room %d", len, room);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (!len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) validate_firmware_response(kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) } else if (len > room) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * Received packet's payload length is larger.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * We can't accommodate it in created skb.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) pr_err("Data length is too large len %d room %d", len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) room);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) kfree_skb(kim_gdata->rx_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * Packet header has non-zero payload length and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * we have enough space in created skb. Lets read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * payload data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) kim_gdata->rx_state = ST_W4_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) kim_gdata->rx_count = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * Change ST LL state to continue to process next
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) kim_gdata->rx_state = ST_W4_PACKET_TYPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) kim_gdata->rx_skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) kim_gdata->rx_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * kim_int_recv - receive function called during firmware download
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * firmware download responses on different UART drivers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * have been observed to come in bursts of different
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * tty_receive and hence the logic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static void kim_int_recv(struct kim_data_s *kim_gdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) const unsigned char *data, long count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) const unsigned char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) int len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) unsigned char *plen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) pr_debug("%s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* Decode received bytes here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ptr = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (unlikely(ptr == NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) pr_err(" received null from TTY ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return;
^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) while (count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (kim_gdata->rx_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) len = min_t(unsigned int, kim_gdata->rx_count, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) skb_put_data(kim_gdata->rx_skb, ptr, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) kim_gdata->rx_count -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) count -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) ptr += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (kim_gdata->rx_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* Check ST RX state machine , where are we? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) switch (kim_gdata->rx_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) /* Waiting for complete packet ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) case ST_W4_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) pr_debug("Complete pkt received");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) validate_firmware_response(kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) kim_gdata->rx_state = ST_W4_PACKET_TYPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) kim_gdata->rx_skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /* Waiting for Bluetooth event header ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) case ST_W4_HEADER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) plen =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) (unsigned char *)&kim_gdata->rx_skb->data[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) pr_debug("event hdr: plen 0x%02x\n", *plen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) kim_check_data_len(kim_gdata, *plen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) } /* end of switch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) } /* end of if rx_state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) switch (*ptr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* Bluetooth event packet? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) case 0x04:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) kim_gdata->rx_state = ST_W4_HEADER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) kim_gdata->rx_count = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) pr_info("unknown packet");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) kim_gdata->rx_skb =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) alloc_skb(1024+8, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (!kim_gdata->rx_skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) pr_err("can't allocate mem for new packet");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) kim_gdata->rx_state = ST_W4_PACKET_TYPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) kim_gdata->rx_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) skb_reserve(kim_gdata->rx_skb, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) kim_gdata->rx_skb->cb[0] = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) kim_gdata->rx_skb->cb[1] = 0;
^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) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) unsigned short version = 0, chip = 0, min_ver = 0, maj_ver = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static const char read_ver_cmd[] = { 0x01, 0x01, 0x10, 0x00 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) pr_debug("%s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) reinit_completion(&kim_gdata->kim_rcvd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (4 != st_int_write(kim_gdata->core_data, read_ver_cmd, 4)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) pr_err("kim: couldn't write 4 bytes");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) timeout = wait_for_completion_interruptible_timeout(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) &kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (timeout <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) pr_err(" waiting for ver info- timed out or received signal");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return timeout ? -ERESTARTSYS : -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) reinit_completion(&kim_gdata->kim_rcvd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * the positions 12 & 13 in the response buffer provide with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * chip, major & minor numbers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) version =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) MAKEWORD(kim_gdata->resp_buffer[12],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) kim_gdata->resp_buffer[13]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) chip = (version & 0x7C00) >> 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) min_ver = (version & 0x007F);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) maj_ver = (version & 0x0380) >> 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (version & 0x8000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) maj_ver |= 0x0008;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) sprintf(bts_scr_name, "ti-connectivity/TIInit_%d.%d.%d.bts",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) chip, maj_ver, min_ver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) /* to be accessed later via sysfs entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) kim_gdata->version.full = version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) kim_gdata->version.chip = chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) kim_gdata->version.maj_ver = maj_ver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) kim_gdata->version.min_ver = min_ver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) pr_info("%s", bts_scr_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static void skip_change_remote_baud(unsigned char **ptr, long *len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) unsigned char *nxt_action, *cur_action;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) cur_action = *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) nxt_action = cur_action + sizeof(struct bts_action) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) ((struct bts_action *) cur_action)->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (((struct bts_action *) nxt_action)->type != ACTION_WAIT_EVENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) pr_err("invalid action after change remote baud command");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) *ptr = *ptr + sizeof(struct bts_action) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) ((struct bts_action *)cur_action)->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) *len = *len - (sizeof(struct bts_action) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) ((struct bts_action *)cur_action)->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /* warn user on not commenting these in firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) pr_warn("skipping the wait event of change remote baud");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * download_firmware -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * internal function which parses through the .bts firmware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) * script file intreprets SEND, DELAY actions only as of now
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static long download_firmware(struct kim_data_s *kim_gdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) long err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) long len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) unsigned char *ptr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) unsigned char *action_ptr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) unsigned char bts_scr_name[40] = { 0 }; /* 40 char long bts scr name? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) int wr_room_space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) int cmd_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) unsigned long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) err = read_local_version(kim_gdata, bts_scr_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if (err != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) pr_err("kim: failed to read local ver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) err =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) request_firmware(&kim_gdata->fw_entry, bts_scr_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) &kim_gdata->kim_pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (unlikely((err != 0) || (kim_gdata->fw_entry->data == NULL) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) (kim_gdata->fw_entry->size == 0))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) pr_err(" request_firmware failed(errno %ld) for %s", err,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) bts_scr_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) ptr = (void *)kim_gdata->fw_entry->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) len = kim_gdata->fw_entry->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * bts_header to remove out magic number and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) ptr += sizeof(struct bts_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) len -= sizeof(struct bts_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) while (len > 0 && ptr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) pr_debug(" action size %d, type %d ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) ((struct bts_action *)ptr)->size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) ((struct bts_action *)ptr)->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) switch (((struct bts_action *)ptr)->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) case ACTION_SEND_COMMAND: /* action send */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) pr_debug("S");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) action_ptr = &(((struct bts_action *)ptr)->data[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (unlikely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) (((struct hci_command *)action_ptr)->opcode ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 0xFF36)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * ignore remote change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * baud rate HCI VS command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) pr_warn("change remote baud"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) " rate command in firmware");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) skip_change_remote_baud(&ptr, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) * Make sure we have enough free space in uart
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) * tx buffer to write current firmware command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) cmd_size = ((struct bts_action *)ptr)->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) timeout = jiffies + msecs_to_jiffies(CMD_WR_TIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) wr_room_space =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) st_get_uart_wr_room(kim_gdata->core_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (wr_room_space < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) pr_err("Unable to get free "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) "space info from uart tx buffer");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) release_firmware(kim_gdata->fw_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return wr_room_space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) mdelay(1); /* wait 1ms before checking room */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) } while ((wr_room_space < cmd_size) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) time_before(jiffies, timeout));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) /* Timeout happened ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (time_after_eq(jiffies, timeout)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) pr_err("Timeout while waiting for free "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) "free space in uart tx buffer");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) release_firmware(kim_gdata->fw_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) return -ETIMEDOUT;
^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) * reinit completion before sending for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * relevant wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) reinit_completion(&kim_gdata->kim_rcvd);
^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) * Free space found in uart buffer, call st_int_write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) * to send current firmware command to the uart tx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) err = st_int_write(kim_gdata->core_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) ((struct bts_action_send *)action_ptr)->data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) ((struct bts_action *)ptr)->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (unlikely(err < 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) release_firmware(kim_gdata->fw_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * Check number of bytes written to the uart tx buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * and requested command write size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (err != cmd_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) pr_err("Number of bytes written to uart "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) "tx buffer are not matching with "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) "requested cmd write size");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) release_firmware(kim_gdata->fw_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) case ACTION_WAIT_EVENT: /* wait */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) pr_debug("W");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) err = wait_for_completion_interruptible_timeout(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) &kim_gdata->kim_rcvd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) msecs_to_jiffies(CMD_RESP_TIME));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) if (err <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) pr_err("response timeout/signaled during fw download ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) /* timed out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) release_firmware(kim_gdata->fw_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return err ? -ERESTARTSYS : -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) reinit_completion(&kim_gdata->kim_rcvd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) case ACTION_DELAY: /* sleep */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) pr_info("sleep command in scr");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) action_ptr = &(((struct bts_action *)ptr)->data[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) mdelay(((struct bts_action_delay *)action_ptr)->msec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) len =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) len - (sizeof(struct bts_action) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) ((struct bts_action *)ptr)->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) ptr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) ptr + sizeof(struct bts_action) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) ((struct bts_action *)ptr)->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) /* fw download complete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) release_firmware(kim_gdata->fw_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^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) /* functions called from ST core */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) /* called from ST Core, when REG_IN_PROGRESS (registration in progress)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * can be because of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * 1. response to read local version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * 2. during send/recv's of firmware download
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) void st_kim_recv(void *disc_data, const unsigned char *data, long count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) struct st_data_s *st_gdata = (struct st_data_s *)disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) struct kim_data_s *kim_gdata = st_gdata->kim_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * proceed to gather all data and distinguish read fw version response
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * from other fw responses when data gathering is complete
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) kim_int_recv(kim_gdata, data, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) * to signal completion of line discipline installation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) * called from ST Core, upon tty_open
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) void st_kim_complete(void *kim_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) complete(&kim_gdata->ldisc_installed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) * st_kim_start - called from ST Core upon 1st registration
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) * This involves toggling the chip enable gpio, reading
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * the firmware version from chip, forming the fw file name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * based on the chip version, requesting the fw, parsing it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) * and perform download(send/recv).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) long st_kim_start(void *kim_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) long err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) long retry = POR_RETRY_COUNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) struct ti_st_plat_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) pr_info(" %s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) pdata = kim_gdata->kim_pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) /* platform specific enabling code here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) if (pdata->chip_enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) pdata->chip_enable(kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) /* Configure BT nShutdown to HIGH state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) mdelay(5); /* FIXME: a proper toggle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) mdelay(100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) /* re-initialize the completion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) reinit_completion(&kim_gdata->ldisc_installed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) /* send notification to UIM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) kim_gdata->ldisc_install = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) pr_info("ldisc_install = 1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) sysfs_notify(&kim_gdata->kim_pdev->dev.kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) NULL, "install");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) /* wait for ldisc to be installed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) err = wait_for_completion_interruptible_timeout(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) * ldisc installation timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) * flush uart, power cycle BT_EN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) pr_err("ldisc installation timeout");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) err = st_kim_stop(kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) /* ldisc installed now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) pr_info("line discipline installed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) err = download_firmware(kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (err != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) * ldisc installed but fw download failed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) * flush uart & power cycle BT_EN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) pr_err("download firmware failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) err = st_kim_stop(kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) } else { /* on success don't retry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) } while (retry--);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) * st_kim_stop - stop communication with chip.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * This can be called from ST Core/KIM, on the-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) * (a) last un-register when chip need not be powered there-after,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * (b) upon failure to either install ldisc or download firmware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * The function is responsible to (a) notify UIM about un-installation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) * (b) flush UART if the ldisc was installed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) * (c) reset BT_EN - pull down nshutdown at the end.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) * (d) invoke platform's chip disabling routine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) long st_kim_stop(void *kim_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) long err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) struct ti_st_plat_data *pdata =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) kim_gdata->kim_pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) struct tty_struct *tty = kim_gdata->core_data->tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) reinit_completion(&kim_gdata->ldisc_installed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) if (tty) { /* can be called before ldisc is installed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) /* Flush any pending characters in the driver and discipline. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) tty_ldisc_flush(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) tty_driver_flush_buffer(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) /* send uninstall notification to UIM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) pr_info("ldisc_install = 0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) kim_gdata->ldisc_install = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, NULL, "install");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) /* wait for ldisc to be un-installed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) err = wait_for_completion_interruptible_timeout(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (!err) { /* timeout */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) pr_err(" timed out waiting for ldisc to be un-installed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) err = -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) /* By default configure BT nShutdown to LOW state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) mdelay(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) mdelay(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* platform specific disable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (pdata->chip_disable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) pdata->chip_disable(kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) /**********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) /* functions called from subsystems */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) /* called when debugfs entry is read from */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) static int version_show(struct seq_file *s, void *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) seq_printf(s, "%04X %d.%d.%d\n", kim_gdata->version.full,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) kim_gdata->version.chip, kim_gdata->version.maj_ver,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) kim_gdata->version.min_ver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) static int list_show(struct seq_file *s, void *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) kim_st_list_protocols(kim_gdata->core_data, s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) static ssize_t show_install(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) struct kim_data_s *kim_data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) return sprintf(buf, "%d\n", kim_data->ldisc_install);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) static ssize_t store_dev_name(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) struct device_attribute *attr, const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) struct kim_data_s *kim_data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) pr_debug("storing dev name >%s<", buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) strncpy(kim_data->dev_name, buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) pr_debug("stored dev name >%s<", kim_data->dev_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) return count;
^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 ssize_t store_baud_rate(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) struct device_attribute *attr, const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) struct kim_data_s *kim_data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) pr_debug("storing baud rate >%s<", buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) sscanf(buf, "%ld", &kim_data->baud_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) pr_debug("stored baud rate >%ld<", kim_data->baud_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) #endif /* if DEBUG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) static ssize_t show_dev_name(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) struct kim_data_s *kim_data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) return sprintf(buf, "%s\n", kim_data->dev_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) static ssize_t show_baud_rate(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) struct kim_data_s *kim_data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) return sprintf(buf, "%d\n", kim_data->baud_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) static ssize_t show_flow_cntrl(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) struct kim_data_s *kim_data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) return sprintf(buf, "%d\n", kim_data->flow_cntrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) /* structures specific for sysfs entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) static struct kobj_attribute ldisc_install =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) __ATTR(install, 0444, (void *)show_install, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) static struct kobj_attribute uart_dev_name =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) #ifdef DEBUG /* TODO: move this to debug-fs if possible */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) __ATTR(dev_name, 0644, (void *)show_dev_name, (void *)store_dev_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) __ATTR(dev_name, 0444, (void *)show_dev_name, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) static struct kobj_attribute uart_baud_rate =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) #ifdef DEBUG /* TODO: move to debugfs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) __ATTR(baud_rate, 0644, (void *)show_baud_rate, (void *)store_baud_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) __ATTR(baud_rate, 0444, (void *)show_baud_rate, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) static struct kobj_attribute uart_flow_cntrl =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) __ATTR(flow_cntrl, 0444, (void *)show_flow_cntrl, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) static struct attribute *uim_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) &ldisc_install.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) &uart_dev_name.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) &uart_baud_rate.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) &uart_flow_cntrl.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) static const struct attribute_group uim_attr_grp = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) .attrs = uim_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) * st_kim_ref - reference the core's data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) * This references the per-ST platform device in the arch/xx/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) * board-xx.c file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) * This would enable multiple such platform devices to exist
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) * on a given platform
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) void st_kim_ref(struct st_data_s **core_data, int id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) struct platform_device *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) struct kim_data_s *kim_gdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) /* get kim_gdata reference from platform device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) pdev = st_get_plat_device(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) if (!pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) kim_gdata = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) if (!kim_gdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) *core_data = kim_gdata->core_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) *core_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) DEFINE_SHOW_ATTRIBUTE(version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) DEFINE_SHOW_ATTRIBUTE(list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) /**********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) /* functions called from platform device driver subsystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) * need to have a relevant platform device entry in the platform's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) * board-*.c file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) static struct dentry *kim_debugfs_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) static int kim_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) struct kim_data_s *kim_gdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) struct ti_st_plat_data *pdata = pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) if ((pdev->id != -1) && (pdev->id < MAX_ST_DEVICES)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) /* multiple devices could exist */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) st_kim_devices[pdev->id] = pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) /* platform's sure about existence of 1 device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) st_kim_devices[0] = pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) kim_gdata = kzalloc(sizeof(struct kim_data_s), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) if (!kim_gdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) pr_err("no mem to allocate");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) platform_set_drvdata(pdev, kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) err = st_core_init(&kim_gdata->core_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) if (err != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) pr_err(" ST core init failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) goto err_core_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) /* refer to itself */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) kim_gdata->core_data->kim_data = kim_gdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) /* Claim the chip enable nShutdown gpio from the system */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) kim_gdata->nshutdown = pdata->nshutdown_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) err = gpio_request(kim_gdata->nshutdown, "kim");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) pr_err(" gpio %d request failed ", kim_gdata->nshutdown);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) goto err_sysfs_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) /* Configure nShutdown GPIO as output=0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) err = gpio_direction_output(kim_gdata->nshutdown, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) pr_err(" unable to configure gpio %d", kim_gdata->nshutdown);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) goto err_sysfs_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) /* get reference of pdev for request_firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) kim_gdata->kim_pdev = pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) init_completion(&kim_gdata->kim_rcvd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) init_completion(&kim_gdata->ldisc_installed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) err = sysfs_create_group(&pdev->dev.kobj, &uim_attr_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) pr_err("failed to create sysfs entries");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) goto err_sysfs_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) /* copying platform data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) strncpy(kim_gdata->dev_name, pdata->dev_name, UART_DEV_NAME_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) kim_gdata->flow_cntrl = pdata->flow_cntrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) kim_gdata->baud_rate = pdata->baud_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) pr_info("sysfs entries created\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) kim_debugfs_dir = debugfs_create_dir("ti-st", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) debugfs_create_file("version", S_IRUGO, kim_debugfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) kim_gdata, &version_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) debugfs_create_file("protocols", S_IRUGO, kim_debugfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) kim_gdata, &list_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) err_sysfs_group:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) st_core_exit(kim_gdata->core_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) err_core_init:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) kfree(kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) static int kim_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) /* free the GPIOs requested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) struct ti_st_plat_data *pdata = pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) struct kim_data_s *kim_gdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) kim_gdata = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) * Free the Bluetooth/FM/GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) * nShutdown gpio from the system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) gpio_free(pdata->nshutdown_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) pr_info("nshutdown GPIO Freed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) debugfs_remove_recursive(kim_debugfs_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) pr_info("sysfs entries removed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) kim_gdata->kim_pdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) st_core_exit(kim_gdata->core_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) kfree(kim_gdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) kim_gdata = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) static int kim_suspend(struct platform_device *pdev, pm_message_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) struct ti_st_plat_data *pdata = pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) if (pdata->suspend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) return pdata->suspend(pdev, state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) static int kim_resume(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) struct ti_st_plat_data *pdata = pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) if (pdata->resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) return pdata->resume(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) /**********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) /* entry point for ST KIM module, called in from ST Core */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) static struct platform_driver kim_platform_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) .probe = kim_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) .remove = kim_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) .suspend = kim_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) .resume = kim_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) .name = "kim",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) module_platform_driver(kim_platform_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) MODULE_AUTHOR("Pavan Savoy <pavan_savoy@ti.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) MODULE_DESCRIPTION("Shared Transport Driver for TI BT/FM/GPS combo chips ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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