^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 driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * HCI-LL module responsible for TI proprietary HCI_LL protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2009-2010 Texas Instruments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Pavan Savoy <pavan_savoy@ti.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) #define pr_fmt(fmt) "(stll) :" fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/ti_wilink_st.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /**********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /* internal functions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static void send_ll_cmd(struct st_data_s *st_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) unsigned char cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) pr_debug("%s: writing %x", __func__, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) st_int_write(st_data, &cmd, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static void ll_device_want_to_sleep(struct st_data_s *st_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct kim_data_s *kim_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct ti_st_plat_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) pr_debug("%s", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* sanity check */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) if (st_data->ll_state != ST_LL_AWAKE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) pr_err("ERR hcill: ST_LL_GO_TO_SLEEP_IND"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) "in state %ld", st_data->ll_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) send_ll_cmd(st_data, LL_SLEEP_ACK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* update state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) st_data->ll_state = ST_LL_ASLEEP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* communicate to platform about chip asleep */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) kim_data = st_data->kim_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) pdata = kim_data->kim_pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (pdata->chip_asleep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) pdata->chip_asleep(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static void ll_device_want_to_wakeup(struct st_data_s *st_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct kim_data_s *kim_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct ti_st_plat_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /* diff actions in diff states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) switch (st_data->ll_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) case ST_LL_ASLEEP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) send_ll_cmd(st_data, LL_WAKE_UP_ACK); /* send wake_ack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) case ST_LL_ASLEEP_TO_AWAKE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /* duplicate wake_ind */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) pr_err("duplicate wake_ind while waiting for Wake ack");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) case ST_LL_AWAKE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /* duplicate wake_ind */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) pr_err("duplicate wake_ind already AWAKE");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) case ST_LL_AWAKE_TO_ASLEEP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* duplicate wake_ind */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) pr_err("duplicate wake_ind");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* update state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) st_data->ll_state = ST_LL_AWAKE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /* communicate to platform about chip wakeup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) kim_data = st_data->kim_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) pdata = kim_data->kim_pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (pdata->chip_awake)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) pdata->chip_awake(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /**********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* functions invoked by ST Core */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* called when ST Core wants to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * enable ST LL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) void st_ll_enable(struct st_data_s *ll)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) ll->ll_state = ST_LL_AWAKE;
^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) /* called when ST Core /local module wants to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * disable ST LL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) void st_ll_disable(struct st_data_s *ll)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ll->ll_state = ST_LL_INVALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* called when ST Core wants to update the state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) void st_ll_wakeup(struct st_data_s *ll)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (likely(ll->ll_state != ST_LL_AWAKE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) send_ll_cmd(ll, LL_WAKE_UP_IND); /* WAKE_IND */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) ll->ll_state = ST_LL_ASLEEP_TO_AWAKE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* don't send the duplicate wake_indication */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) pr_err(" Chip already AWAKE ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* called when ST Core wants the state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) unsigned long st_ll_getstate(struct st_data_s *ll)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) pr_debug(" returning state %ld", ll->ll_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return ll->ll_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /* called from ST Core, when a PM related packet arrives */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) unsigned long st_ll_sleep_state(struct st_data_s *st_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) unsigned char cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) case LL_SLEEP_IND: /* sleep ind */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) pr_debug("sleep indication recvd");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) ll_device_want_to_sleep(st_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) case LL_SLEEP_ACK: /* sleep ack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) pr_err("sleep ack rcvd: host shouldn't");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) case LL_WAKE_UP_IND: /* wake ind */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) pr_debug("wake indication recvd");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) ll_device_want_to_wakeup(st_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) case LL_WAKE_UP_ACK: /* wake ack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) pr_debug("wake ack rcvd");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) st_data->ll_state = ST_LL_AWAKE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) pr_err(" unknown input/state ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return -EINVAL;
^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) /* Called from ST CORE to initialize ST LL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) long st_ll_init(struct st_data_s *ll)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /* set state to invalid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) ll->ll_state = ST_LL_INVALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /* Called from ST CORE to de-initialize ST LL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) long st_ll_deinit(struct st_data_s *ll)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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