struct bus_request bus_req[BUS_REQUEST_MAX_NUM];
struct ath6kl *ar;
+
u8 *dma_buffer;
+ /* protects access to dma_buffer */
+ struct mutex dma_buffer_mutex;
+
/* scatter request list head */
struct list_head scat_req;
+ /* Avoids disabling irq while the interrupts being handled */
+ struct mutex mtx_irq;
+
spinlock_t scat_lock;
bool scatter_enabled;
bool is_disabled;
- atomic_t irq_handling;
const struct sdio_device_id *id;
struct work_struct wr_async_work;
struct list_head wr_asyncq;
if (buf_needs_bounce(buf)) {
if (!ar_sdio->dma_buffer)
return -ENOMEM;
+ mutex_lock(&ar_sdio->dma_buffer_mutex);
tbuf = ar_sdio->dma_buffer;
memcpy(tbuf, buf, len);
bounced = true;
if ((request & HIF_READ) && bounced)
memcpy(buf, tbuf, len);
+ if (bounced)
+ mutex_unlock(&ar_sdio->dma_buffer_mutex);
+
return ret;
}
ath6kl_dbg(ATH6KL_DBG_SDIO, "irq\n");
ar_sdio = sdio_get_drvdata(func);
- atomic_set(&ar_sdio->irq_handling, 1);
-
+ mutex_lock(&ar_sdio->mtx_irq);
/*
* Release the host during interrups so we can pick it back up when
* we process commands.
status = ath6kl_hif_intr_bh_handler(ar_sdio->ar);
sdio_claim_host(ar_sdio->func);
- atomic_set(&ar_sdio->irq_handling, 0);
+ mutex_unlock(&ar_sdio->mtx_irq);
WARN_ON(status && status != -ECANCELED);
}
sdio_claim_host(ar_sdio->func);
- /* Mask our function IRQ */
- while (atomic_read(&ar_sdio->irq_handling)) {
- sdio_release_host(ar_sdio->func);
- schedule_timeout(HZ / 10);
- sdio_claim_host(ar_sdio->func);
- }
+ mutex_lock(&ar_sdio->mtx_irq);
ret = sdio_release_irq(ar_sdio->func);
if (ret)
ath6kl_err("Failed to release sdio irq: %d\n", ret);
+ mutex_unlock(&ar_sdio->mtx_irq);
+
sdio_release_host(ar_sdio->func);
}
if (ret) {
ath6kl_err("Set sdio block size %d failed: %d)\n",
HIF_MBOX_BLOCK_SIZE, ret);
- sdio_release_host(func);
goto out;
}
return ret;
}
- if ((flags & MMC_PM_WAKE_SDIO_IRQ) && wow) {
+ if (!(flags & MMC_PM_WAKE_SDIO_IRQ))
+ goto deepsleep;
+
+ /* sdio irq wakes up host */
+
+ if (ar->state == ATH6KL_STATE_SCHED_SCAN) {
+ ret = ath6kl_cfg80211_suspend(ar,
+ ATH6KL_CFG_SUSPEND_SCHED_SCAN,
+ NULL);
+ if (ret) {
+ ath6kl_warn("Schedule scan suspend failed: %d", ret);
+ return ret;
+ }
+
+ ret = sdio_set_host_pm_flags(func, MMC_PM_WAKE_SDIO_IRQ);
+ if (ret)
+ ath6kl_warn("set sdio wake irq flag failed: %d\n", ret);
+
+ return ret;
+ }
+
+ if (wow) {
/*
* The host sdio controller is capable of keep power and
* sdio irq wake up at this point. It's fine to continue
return ret;
}
+deepsleep:
return ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_DEEPSLEEP, NULL);
}
case ATH6KL_STATE_WOW:
break;
+ case ATH6KL_STATE_SCHED_SCAN:
+ break;
}
ath6kl_cfg80211_resume(ar);
return 0;
}
+/* set the window address register (using 4-byte register access ). */
+static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr)
+{
+ int status;
+ u8 addr_val[4];
+ s32 i;
+
+ /*
+ * Write bytes 1,2,3 of the register to set the upper address bytes,
+ * the LSB is written last to initiate the access cycle
+ */
+
+ for (i = 1; i <= 3; i++) {
+ /*
+ * Fill the buffer with the address byte value we want to
+ * hit 4 times.
+ */
+ memset(addr_val, ((u8 *)&addr)[i], 4);
+
+ /*
+ * Hit each byte of the register address with a 4-byte
+ * write operation to the same address, this is a harmless
+ * operation.
+ */
+ status = ath6kl_sdio_read_write_sync(ar, reg_addr + i, addr_val,
+ 4, HIF_WR_SYNC_BYTE_FIX);
+ if (status)
+ break;
+ }
+
+ if (status) {
+ ath6kl_err("%s: failed to write initial bytes of 0x%x "
+ "to window reg: 0x%X\n", __func__,
+ addr, reg_addr);
+ return status;
+ }
+
+ /*
+ * Write the address register again, this time write the whole
+ * 4-byte value. The effect here is that the LSB write causes the
+ * cycle to start, the extra 3 byte write to bytes 1,2,3 has no
+ * effect since we are writing the same values again
+ */
+ status = ath6kl_sdio_read_write_sync(ar, reg_addr, (u8 *)(&addr),
+ 4, HIF_WR_SYNC_BYTE_INC);
+
+ if (status) {
+ ath6kl_err("%s: failed to write 0x%x to window reg: 0x%X\n",
+ __func__, addr, reg_addr);
+ return status;
+ }
+
+ return 0;
+}
+
+static int ath6kl_sdio_diag_read32(struct ath6kl *ar, u32 address, u32 *data)
+{
+ int status;
+
+ /* set window register to start read cycle */
+ status = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS,
+ address);
+
+ if (status)
+ return status;
+
+ /* read the data */
+ status = ath6kl_sdio_read_write_sync(ar, WINDOW_DATA_ADDRESS,
+ (u8 *)data, sizeof(u32), HIF_RD_SYNC_BYTE_INC);
+ if (status) {
+ ath6kl_err("%s: failed to read from window data addr\n",
+ __func__);
+ return status;
+ }
+
+ return status;
+}
+
+static int ath6kl_sdio_diag_write32(struct ath6kl *ar, u32 address,
+ __le32 data)
+{
+ int status;
+ u32 val = (__force u32) data;
+
+ /* set write data */
+ status = ath6kl_sdio_read_write_sync(ar, WINDOW_DATA_ADDRESS,
+ (u8 *) &val, sizeof(u32), HIF_WR_SYNC_BYTE_INC);
+ if (status) {
+ ath6kl_err("%s: failed to write 0x%x to window data addr\n",
+ __func__, data);
+ return status;
+ }
+
+ /* set window register, which starts the write cycle */
+ return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS,
+ address);
+}
+
+static int ath6kl_sdio_bmi_credits(struct ath6kl *ar)
+{
+ u32 addr;
+ unsigned long timeout;
+ int ret;
+
+ ar->bmi.cmd_credits = 0;
+
+ /* Read the counter register to get the command credits */
+ addr = COUNT_DEC_ADDRESS + (HTC_MAILBOX_NUM_MAX + ENDPOINT1) * 4;
+
+ timeout = jiffies + msecs_to_jiffies(BMI_COMMUNICATION_TIMEOUT);
+ while (time_before(jiffies, timeout) && !ar->bmi.cmd_credits) {
+
+ /*
+ * Hit the credit counter with a 4-byte access, the first byte
+ * read will hit the counter and cause a decrement, while the
+ * remaining 3 bytes has no effect. The rationale behind this
+ * is to make all HIF accesses 4-byte aligned.
+ */
+ ret = ath6kl_sdio_read_write_sync(ar, addr,
+ (u8 *)&ar->bmi.cmd_credits, 4,
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret) {
+ ath6kl_err("Unable to decrement the command credit "
+ "count register: %d\n", ret);
+ return ret;
+ }
+
+ /* The counter is only 8 bits.
+ * Ignore anything in the upper 3 bytes
+ */
+ ar->bmi.cmd_credits &= 0xFF;
+ }
+
+ if (!ar->bmi.cmd_credits) {
+ ath6kl_err("bmi communication timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int ath6kl_bmi_get_rx_lkahd(struct ath6kl *ar)
+{
+ unsigned long timeout;
+ u32 rx_word = 0;
+ int ret = 0;
+
+ timeout = jiffies + msecs_to_jiffies(BMI_COMMUNICATION_TIMEOUT);
+ while ((time_before(jiffies, timeout)) && !rx_word) {
+ ret = ath6kl_sdio_read_write_sync(ar,
+ RX_LOOKAHEAD_VALID_ADDRESS,
+ (u8 *)&rx_word, sizeof(rx_word),
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret) {
+ ath6kl_err("unable to read RX_LOOKAHEAD_VALID\n");
+ return ret;
+ }
+
+ /* all we really want is one bit */
+ rx_word &= (1 << ENDPOINT1);
+ }
+
+ if (!rx_word) {
+ ath6kl_err("bmi_recv_buf FIFO empty\n");
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int ath6kl_sdio_bmi_write(struct ath6kl *ar, u8 *buf, u32 len)
+{
+ int ret;
+ u32 addr;
+
+ ret = ath6kl_sdio_bmi_credits(ar);
+ if (ret)
+ return ret;
+
+ addr = ar->mbox_info.htc_addr;
+
+ ret = ath6kl_sdio_read_write_sync(ar, addr, buf, len,
+ HIF_WR_SYNC_BYTE_INC);
+ if (ret)
+ ath6kl_err("unable to send the bmi data to the device\n");
+
+ return ret;
+}
+
+static int ath6kl_sdio_bmi_read(struct ath6kl *ar, u8 *buf, u32 len)
+{
+ int ret;
+ u32 addr;
+
+ /*
+ * During normal bootup, small reads may be required.
+ * Rather than issue an HIF Read and then wait as the Target
+ * adds successive bytes to the FIFO, we wait here until
+ * we know that response data is available.
+ *
+ * This allows us to cleanly timeout on an unexpected
+ * Target failure rather than risk problems at the HIF level.
+ * In particular, this avoids SDIO timeouts and possibly garbage
+ * data on some host controllers. And on an interconnect
+ * such as Compact Flash (as well as some SDIO masters) which
+ * does not provide any indication on data timeout, it avoids
+ * a potential hang or garbage response.
+ *
+ * Synchronization is more difficult for reads larger than the
+ * size of the MBOX FIFO (128B), because the Target is unable
+ * to push the 129th byte of data until AFTER the Host posts an
+ * HIF Read and removes some FIFO data. So for large reads the
+ * Host proceeds to post an HIF Read BEFORE all the data is
+ * actually available to read. Fortunately, large BMI reads do
+ * not occur in practice -- they're supported for debug/development.
+ *
+ * So Host/Target BMI synchronization is divided into these cases:
+ * CASE 1: length < 4
+ * Should not happen
+ *
+ * CASE 2: 4 <= length <= 128
+ * Wait for first 4 bytes to be in FIFO
+ * If CONSERVATIVE_BMI_READ is enabled, also wait for
+ * a BMI command credit, which indicates that the ENTIRE
+ * response is available in the the FIFO
+ *
+ * CASE 3: length > 128
+ * Wait for the first 4 bytes to be in FIFO
+ *
+ * For most uses, a small timeout should be sufficient and we will
+ * usually see a response quickly; but there may be some unusual
+ * (debug) cases of BMI_EXECUTE where we want an larger timeout.
+ * For now, we use an unbounded busy loop while waiting for
+ * BMI_EXECUTE.
+ *
+ * If BMI_EXECUTE ever needs to support longer-latency execution,
+ * especially in production, this code needs to be enhanced to sleep
+ * and yield. Also note that BMI_COMMUNICATION_TIMEOUT is currently
+ * a function of Host processor speed.
+ */
+ if (len >= 4) { /* NB: Currently, always true */
+ ret = ath6kl_bmi_get_rx_lkahd(ar);
+ if (ret)
+ return ret;
+ }
+
+ addr = ar->mbox_info.htc_addr;
+ ret = ath6kl_sdio_read_write_sync(ar, addr, buf, len,
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret) {
+ ath6kl_err("Unable to read the bmi data from the device: %d\n",
+ ret);
+ return ret;
+ }
+
+ return 0;
+}
+
static void ath6kl_sdio_stop(struct ath6kl *ar)
{
struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
.cleanup_scatter = ath6kl_sdio_cleanup_scatter,
.suspend = ath6kl_sdio_suspend,
.resume = ath6kl_sdio_resume,
+ .diag_read32 = ath6kl_sdio_diag_read32,
+ .diag_write32 = ath6kl_sdio_diag_write32,
+ .bmi_read = ath6kl_sdio_bmi_read,
+ .bmi_write = ath6kl_sdio_bmi_write,
.power_on = ath6kl_sdio_power_on,
.power_off = ath6kl_sdio_power_off,
.stop = ath6kl_sdio_stop,
spin_lock_init(&ar_sdio->lock);
spin_lock_init(&ar_sdio->scat_lock);
spin_lock_init(&ar_sdio->wr_async_lock);
+ mutex_init(&ar_sdio->dma_buffer_mutex);
+ mutex_init(&ar_sdio->mtx_irq);
INIT_LIST_HEAD(&ar_sdio->scat_req);
INIT_LIST_HEAD(&ar_sdio->bus_req_freeq);
}
ar_sdio->ar = ar;
+ ar->hif_type = ATH6KL_HIF_TYPE_SDIO;
ar->hif_priv = ar_sdio;
ar->hif_ops = &ath6kl_sdio_ops;
+ ar->bmi.max_data_size = 256;
ath6kl_sdio_set_mbox_info(ar);
static const struct sdio_device_id ath6kl_sdio_devices[] = {
{SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x0))},
{SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x1))},
+ {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6004_BASE | 0x0))},
+ {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6004_BASE | 0x1))},
{},
};
MODULE_DESCRIPTION("Driver support for Atheros AR600x SDIO devices");
MODULE_LICENSE("Dual BSD/GPL");
-MODULE_FIRMWARE(AR6003_REV2_OTP_FILE);
-MODULE_FIRMWARE(AR6003_REV2_FIRMWARE_FILE);
-MODULE_FIRMWARE(AR6003_REV2_PATCH_FILE);
-MODULE_FIRMWARE(AR6003_REV2_BOARD_DATA_FILE);
-MODULE_FIRMWARE(AR6003_REV2_DEFAULT_BOARD_DATA_FILE);
-MODULE_FIRMWARE(AR6003_REV3_OTP_FILE);
-MODULE_FIRMWARE(AR6003_REV3_FIRMWARE_FILE);
-MODULE_FIRMWARE(AR6003_REV3_PATCH_FILE);
-MODULE_FIRMWARE(AR6003_REV3_BOARD_DATA_FILE);
-MODULE_FIRMWARE(AR6003_REV3_DEFAULT_BOARD_DATA_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_0_FW_DIR "/" AR6003_HW_2_0_OTP_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_0_FW_DIR "/" AR6003_HW_2_0_FIRMWARE_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_0_FW_DIR "/" AR6003_HW_2_0_PATCH_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_0_BOARD_DATA_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_0_DEFAULT_BOARD_DATA_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_1_1_FW_DIR "/" AR6003_HW_2_1_1_OTP_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_1_1_FW_DIR "/" AR6003_HW_2_1_1_FIRMWARE_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_1_1_FW_DIR "/" AR6003_HW_2_1_1_PATCH_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_1_1_BOARD_DATA_FILE);
+MODULE_FIRMWARE(AR6003_HW_2_1_1_DEFAULT_BOARD_DATA_FILE);
+MODULE_FIRMWARE(AR6004_HW_1_0_FW_DIR "/" AR6004_HW_1_0_FIRMWARE_FILE);
+MODULE_FIRMWARE(AR6004_HW_1_0_BOARD_DATA_FILE);
+MODULE_FIRMWARE(AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE);
+MODULE_FIRMWARE(AR6004_HW_1_1_FW_DIR "/" AR6004_HW_1_1_FIRMWARE_FILE);
+MODULE_FIRMWARE(AR6004_HW_1_1_BOARD_DATA_FILE);
+MODULE_FIRMWARE(AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE);
projects / cascardo / linux.git / blobdiff