From: Shahar Levi <shahar_levi@xxxxxx>
Boot sequence support FREF clock and TCXO clock.
WL128x has two clocks input - TCXO and FREF.
TCXO is the main clock of the device, while FREF is used to sync
between the GPS and the cellular modem.
Auto-detection checks where TCXO is 32.736MHz or 16.368MHz, in that
case the FREF will be used as the WLAN/BT main clock.
[Use clock enumeration as defined in linux/wl12xx.h; remove
unnecessary else block in wl128x_switch_fref; remove unnecessary
change in main.c; remove some unnecessary debug prints and comments;
fix potential use of uninitialized value (pll_config) -- Luca]
Signed-off-by: Shahar Levi <shahar_levi@xxxxxx>
Reviewed-by: Luciano Coelho <coelho@xxxxxx>
Signed-off-by: Luciano Coelho <coelho@xxxxxx>
---
drivers/net/wireless/wl12xx/boot.c | 183 +++++++++++++++++++++++++++++--
drivers/net/wireless/wl12xx/sdio.c | 1 +
drivers/net/wireless/wl12xx/sdio_test.c | 1 +
drivers/net/wireless/wl12xx/spi.c | 1 +
drivers/net/wireless/wl12xx/wl12xx.h | 1 +
5 files changed, 179 insertions(+), 8 deletions(-)
diff --git a/drivers/net/wireless/wl12xx/boot.c b/drivers/net/wireless/wl12xx/boot.c
index 38f3e8b..9d742c1 100644
--- a/drivers/net/wireless/wl12xx/boot.c
+++ b/drivers/net/wireless/wl12xx/boot.c
@@ -22,6 +22,7 @@
*/
#include <linux/slab.h>
+#include <linux/wl12xx.h>
#include "acx.h"
#include "reg.h"
@@ -520,24 +521,159 @@ static void wl1271_boot_hw_version(struct wl1271 *wl)
wl->quirks |= WL12XX_QUIRK_END_OF_TRANSACTION;
}
-/* uploads NVS and firmware */
-int wl1271_load_firmware(struct wl1271 *wl)
+/*
+ * WL128x has two clocks input - TCXO and FREF.
+ * TCXO is the main clock of the device, while FREF is used to sync
+ * between the GPS and the cellular modem.
+ * In cases where TCXO is 32.736MHz or 16.368MHz, the FREF will be used
+ * as the WLAN/BT main clock.
+ */
+static int wl128x_switch_fref(struct wl1271 *wl, bool *is_ref_clk)
{
- int ret = 0;
- u32 tmp, clk, pause;
+ u16 sys_clk_cfg_val;
+
+ /* if working on XTAL-only mode go directly to TCXO TO FREF SWITCH */
+ if ((wl->ref_clock == CONF_REF_CLK_38_4_M_XTAL) ||
+ (wl->ref_clock == CONF_REF_CLK_26_M_XTAL))
+ return true;
+
+ /* Read clock source FREF or TCXO */
+ sys_clk_cfg_val = wl1271_top_reg_read(wl, SYS_CLK_CFG_REG);
+
+ if (sys_clk_cfg_val & PRCM_CM_EN_MUX_WLAN_FREF) {
+ /* if bit 3 is set - working with FREF clock */
+ wl1271_debug(DEBUG_BOOT, "working with FREF clock, skip"
+ " to FREF");
+
+ *is_ref_clk = true;
+ } else {
+ /* if bit 3 is clear - working with TCXO clock */
+ wl1271_debug(DEBUG_BOOT, "working with TCXO clock");
+
+ /* TCXO to FREF switch, check TXCO clock config */
+ if ((wl->tcxo_clock != WL12XX_TCXOCLOCK_16_368) &&
+ (wl->tcxo_clock != WL12XX_TCXOCLOCK_32_736)) {
+ /*
+ * not 16.368Mhz and not 32.736Mhz - skip to
+ * configure ELP stage
+ */
+ wl1271_debug(DEBUG_BOOT, "NEW PLL ALGO:"
+ " TcxoRefClk=%d - not 16.368Mhz and not"
+ " 32.736Mhz - skip to configure ELP"
+ " stage", wl->tcxo_clock);
+
+ *is_ref_clk = false;
+ } else {
+ wl1271_debug(DEBUG_BOOT, "NEW PLL ALGO:"
+ "TcxoRefClk=%d - 16.368Mhz or 32.736Mhz"
+ " - TCXO to FREF switch",
+ wl->tcxo_clock);
+
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static int wl128x_boot_clk(struct wl1271 *wl, bool *is_ref_clk)
+{
+ if (wl128x_switch_fref(wl, is_ref_clk)) {
+ wl1271_debug(DEBUG_BOOT, "XTAL-only mode go directly to"
+ " TCXO TO FREF SWITCH");
+ /* TCXO to FREF switch - for PG2.0 */
+ wl1271_top_reg_write(wl, WL_SPARE_REG,
+ WL_SPARE_MASK_8526);
+
+ wl1271_top_reg_write(wl, SYS_CLK_CFG_REG,
+ WL_CLK_REQ_TYPE_PG2 | MCS_PLL_CLK_SEL_FREF);
+
+ *is_ref_clk = true;
+ mdelay(15);
+ }
+
+ /* Set bit 2 in spare register to avoid illegal access */
+ wl1271_top_reg_write(wl, WL_SPARE_REG, WL_SPARE_VAL);
+
+ /* working with TCXO clock */
+ if ((*is_ref_clk == false) &&
+ ((wl->tcxo_clock == WL12XX_TCXOCLOCK_16_8) ||
+ (wl->tcxo_clock == WL12XX_TCXOCLOCK_33_6))) {
+ wl1271_debug(DEBUG_BOOT, "16_8_M or 33_6_M TCXO detected");
+
+ /* Manually Configure MCS PLL settings PG2.0 Only */
+ wl1271_top_reg_write(wl, MCS_PLL_M_REG, MCS_PLL_M_REG_VAL);
+ wl1271_top_reg_write(wl, MCS_PLL_N_REG, MCS_PLL_N_REG_VAL);
+ wl1271_top_reg_write(wl, MCS_PLL_CONFIG_REG,
+ MCS_PLL_CONFIG_REG_VAL);
+ } else {
+ int pll_config;
+ u16 mcs_pll_config_val;
+
+ /*
+ * Configure MCS PLL settings to FREF Freq
+ * Set the values that determine the time elapse since the PLL's
+ * get their enable signal until the lock indication is set
+ */
+ wl1271_top_reg_write(wl, PLL_LOCK_COUNTERS_REG,
+ PLL_LOCK_COUNTERS_COEX | PLL_LOCK_COUNTERS_MCS);
+
+ mcs_pll_config_val = wl1271_top_reg_read(wl,
+ MCS_PLL_CONFIG_REG);
+ /*
+ * Set the MCS PLL input frequency value according to the
+ * reference clock value detected/read
+ */
+ if (*is_ref_clk == false) {
+ if ((wl->tcxo_clock == WL12XX_TCXOCLOCK_19_2) ||
+ (wl->tcxo_clock == WL12XX_TCXOCLOCK_38_4))
+ pll_config = 1;
+ else if ((wl->tcxo_clock == WL12XX_TCXOCLOCK_26)
+ ||
+ (wl->tcxo_clock == WL12XX_TCXOCLOCK_52))
+ pll_config = 2;
+ else
+ return -EINVAL;
+ } else {
+ if ((wl->ref_clock == CONF_REF_CLK_19_2_E) ||
+ (wl->ref_clock == CONF_REF_CLK_38_4_E))
+ pll_config = 1;
+ else if ((wl->ref_clock == CONF_REF_CLK_26_E) ||
+ (wl->ref_clock == CONF_REF_CLK_52_E))
+ pll_config = 2;
+ else
+ return -EINVAL;
+ }
+
+ mcs_pll_config_val |= (pll_config << (MCS_SEL_IN_FREQ_SHIFT)) &
+ (MCS_SEL_IN_FREQ_MASK);
+ wl1271_top_reg_write(wl, MCS_PLL_CONFIG_REG,
+ mcs_pll_config_val);
+ }
+
+ return 0;
+}
+
+static int wl127x_boot_clk(struct wl1271 *wl)
+{
+ u32 pause;
+ u32 clk;
wl1271_boot_hw_version(wl);
- if (wl->ref_clock == 0 || wl->ref_clock == 2 || wl->ref_clock == 4)
+ if (wl->ref_clock == CONF_REF_CLK_19_2_E ||
+ wl->ref_clock == CONF_REF_CLK_38_4_E ||
+ wl->ref_clock == CONF_REF_CLK_38_4_M_XTAL)
/* ref clk: 19.2/38.4/38.4-XTAL */
clk = 0x3;
- else if (wl->ref_clock == 1 || wl->ref_clock == 3)
+ else if (wl->ref_clock == CONF_REF_CLK_26_E ||
+ wl->ref_clock == CONF_REF_CLK_52_E)
/* ref clk: 26/52 */
clk = 0x5;
else
return -EINVAL;
- if (wl->ref_clock != 0) {
+ if (wl->ref_clock != CONF_REF_CLK_19_2_E) {
u16 val;
/* Set clock type (open drain) */
val = wl1271_top_reg_read(wl, OCP_REG_CLK_TYPE);
@@ -567,6 +703,26 @@ int wl1271_load_firmware(struct wl1271 *wl)
pause |= WU_COUNTER_PAUSE_VAL;
wl1271_write32(wl, WU_COUNTER_PAUSE, pause);
+ return 0;
+}
+
+/* uploads NVS and firmware */
+int wl1271_load_firmware(struct wl1271 *wl)
+{
+ int ret = 0;
+ u32 tmp, clk;
+ bool is_ref_clk = false;
+
+ if (wl->chip.id == CHIP_ID_1283_PG20) {
+ ret = wl128x_boot_clk(wl, &is_ref_clk);
+ if (ret < 0)
+ goto out;
+ } else {
+ ret = wl127x_boot_clk(wl);
+ if (ret < 0)
+ goto out;
+ }
+
/* Continue the ELP wake up sequence */
wl1271_write32(wl, WELP_ARM_COMMAND, WELP_ARM_COMMAND_VAL);
udelay(500);
@@ -582,7 +738,15 @@ int wl1271_load_firmware(struct wl1271 *wl)
wl1271_debug(DEBUG_BOOT, "clk2 0x%x", clk);
- clk |= (wl->ref_clock << 1) << 4;
+ if (wl->chip.id == CHIP_ID_1283_PG20) {
+ if (is_ref_clk == false)
+ clk |= ((wl->tcxo_clock & 0x3) << 1) << 4;
+ else
+ clk |= ((wl->ref_clock & 0x3) << 1) << 4;
+ } else {
+ clk |= (wl->ref_clock << 1) << 4;
+ }
+
wl1271_write32(wl, DRPW_SCRATCH_START, clk);
wl1271_set_partition(wl, &part_table[PART_WORK]);
@@ -615,6 +779,9 @@ int wl1271_load_firmware(struct wl1271 *wl)
/* WL1271: The reference driver skips steps 7 to 10 (jumps directly
* to upload_fw) */
+ if (wl->chip.id == CHIP_ID_1283_PG20)
+ wl1271_top_reg_write(wl, SDIO_IO_DS, HCI_IO_DS_6MA);
+
ret = wl1271_boot_upload_firmware(wl);
if (ret < 0)
goto out;
diff --git a/drivers/net/wireless/wl12xx/sdio.c b/drivers/net/wireless/wl12xx/sdio.c
index 55dc6e3..19cdf7c 100644
--- a/drivers/net/wireless/wl12xx/sdio.c
+++ b/drivers/net/wireless/wl12xx/sdio.c
@@ -255,6 +255,7 @@ static int __devinit wl1271_probe(struct sdio_func *func,
wl->irq = wlan_data->irq;
wl->ref_clock = wlan_data->board_ref_clock;
+ wl->tcxo_clock = wlan_data->board_tcxo_clock;
ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
diff --git a/drivers/net/wireless/wl12xx/sdio_test.c b/drivers/net/wireless/wl12xx/sdio_test.c
index e6e2ad6..c02c870 100644
--- a/drivers/net/wireless/wl12xx/sdio_test.c
+++ b/drivers/net/wireless/wl12xx/sdio_test.c
@@ -421,6 +421,7 @@ static int __devinit wl1271_probe(struct sdio_func *func,
wl->irq = wlan_data->irq;
wl->ref_clock = wlan_data->board_ref_clock;
+ wl->tcxo_clock = wlan_data->board_tcxo_clock;
sdio_set_drvdata(func, wl_test);
diff --git a/drivers/net/wireless/wl12xx/spi.c b/drivers/net/wireless/wl12xx/spi.c
index 2a57583..2064a93 100644
--- a/drivers/net/wireless/wl12xx/spi.c
+++ b/drivers/net/wireless/wl12xx/spi.c
@@ -401,6 +401,7 @@ static int __devinit wl1271_probe(struct spi_device *spi)
}
wl->ref_clock = pdata->board_ref_clock;
+ wl->tcxo_clock = pdata->board_tcxo_clock;
wl->irq = spi->irq;
if (wl->irq < 0) {
diff --git a/drivers/net/wireless/wl12xx/wl12xx.h b/drivers/net/wireless/wl12xx/wl12xx.h
index e59f539..4b55677 100644
--- a/drivers/net/wireless/wl12xx/wl12xx.h
+++ b/drivers/net/wireless/wl12xx/wl12xx.h
@@ -535,6 +535,7 @@ struct wl1271 {
u8 ba_rx_bitmap;
u32 block_size;
+ int tcxo_clock;
/*
* AP-mode - links indexed by HLID. The global and broadcast links
--
1.7.1
--
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