wl12xx: add driver

wl12xx is a driver for TI wl1251 802.11 chipset designed for embedded
devices, supporting both SDIO and SPI busses. Currently the driver
supports only SPI. Adding support 1253 (the 5 GHz version) should be
relatively easy. More information here:

http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?contentId=4711&navigationId=12494&templateId=6123

(Collapsed original sequence of pre-merge patches into single commit for
initial merge. -- JWL)

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 353 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/cmd.c b/drivers/net/wireless/wl12xx/cmd.c
new file mode 100644
index 0000000..f73ab60
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/cmd.c
@@ -0,0 +1,353 @@
+#include "cmd.h"
+
+#include <linux/module.h>
+#include <linux/crc7.h>
+#include <linux/spi/spi.h>
+
+#include "wl12xx.h"
+#include "wl12xx_80211.h"
+#include "reg.h"
+#include "spi.h"
+#include "ps.h"
+
+int wl12xx_cmd_send(struct wl12xx *wl, u16 type, void *buf, size_t buf_len)
+{
+	struct wl12xx_command cmd;
+	unsigned long timeout;
+	size_t cmd_len;
+	u32 intr;
+	int ret = 0;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.id = type;
+	cmd.status = 0;
+	memcpy(cmd.parameters, buf, buf_len);
+	cmd_len = ALIGN(buf_len, 4) + CMDMBOX_HEADER_LEN;
+
+	wl12xx_ps_elp_wakeup(wl);
+
+	wl12xx_spi_mem_write(wl, wl->cmd_box_addr, &cmd, cmd_len);
+
+	wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_CMD);
+
+	timeout = jiffies + msecs_to_jiffies(WL12XX_COMMAND_TIMEOUT);
+
+	intr = wl12xx_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
+	while (!(intr & wl->chip.intr_cmd_complete)) {
+		if (time_after(jiffies, timeout)) {
+			wl12xx_error("command complete timeout");
+			ret = -ETIMEDOUT;
+			goto out;
+		}
+
+		msleep(1);
+
+		intr = wl12xx_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
+	}
+
+	wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
+			   wl->chip.intr_cmd_complete);
+
+out:
+	wl12xx_ps_elp_sleep(wl);
+
+	return ret;
+}
+
+int wl12xx_cmd_test(struct wl12xx *wl, void *buf, size_t buf_len, u8 answer)
+{
+	int ret;
+
+	wl12xx_debug(DEBUG_CMD, "cmd test");
+
+	ret = wl12xx_cmd_send(wl, CMD_TEST, buf, buf_len);
+	if (ret < 0) {
+		wl12xx_warning("TEST command failed");
+		return ret;
+	}
+
+	if (answer) {
+		struct wl12xx_command *cmd_answer;
+
+		/*
+		 * The test command got in, we can read the answer.
+		 * The answer would be a wl12xx_command, where the
+		 * parameter array contains the actual answer.
+		 */
+
+		wl12xx_ps_elp_wakeup(wl);
+
+		wl12xx_spi_mem_read(wl, wl->cmd_box_addr, buf, buf_len);
+
+		wl12xx_ps_elp_sleep(wl);
+
+		cmd_answer = buf;
+		if (cmd_answer->status != CMD_STATUS_SUCCESS)
+			wl12xx_error("TEST command answer error: %d",
+				     cmd_answer->status);
+	}
+
+	return 0;
+}
+
+
+int wl12xx_cmd_interrogate(struct wl12xx *wl, u16 ie_id, u16 ie_len,
+			   void *answer)
+{
+	struct wl12xx_command *cmd;
+	struct acx_header header;
+	int ret;
+
+	wl12xx_debug(DEBUG_CMD, "cmd interrogate");
+
+	header.id = ie_id;
+	header.len = ie_len - sizeof(header);
+
+	ret = wl12xx_cmd_send(wl, CMD_INTERROGATE, &header, sizeof(header));
+	if (ret < 0) {
+		wl12xx_error("INTERROGATE command failed");
+		return ret;
+	}
+
+	wl12xx_ps_elp_wakeup(wl);
+
+	/* the interrogate command got in, we can read the answer */
+	wl12xx_spi_mem_read(wl, wl->cmd_box_addr, answer,
+			    CMDMBOX_HEADER_LEN + ie_len);
+
+	wl12xx_ps_elp_sleep(wl);
+
+	cmd = answer;
+	if (cmd->status != CMD_STATUS_SUCCESS)
+		wl12xx_error("INTERROGATE command error: %d",
+			     cmd->status);
+
+	return 0;
+
+}
+
+int wl12xx_cmd_configure(struct wl12xx *wl, void *ie, int ie_len)
+{
+	int ret;
+
+	wl12xx_debug(DEBUG_CMD, "cmd configure");
+
+	ret = wl12xx_cmd_send(wl, CMD_CONFIGURE, ie,
+			      ie_len);
+	if (ret < 0) {
+		wl12xx_warning("CONFIGURE command NOK");
+		return ret;
+	}
+
+	return 0;
+
+}
+
+int wl12xx_cmd_vbm(struct wl12xx *wl, u8 identity,
+		   void *bitmap, u16 bitmap_len, u8 bitmap_control)
+{
+	struct vbm_update_request vbm;
+	int ret;
+
+	wl12xx_debug(DEBUG_CMD, "cmd vbm");
+
+	/* Count and period will be filled by the target */
+	vbm.tim.bitmap_ctrl = bitmap_control;
+	if (bitmap_len > PARTIAL_VBM_MAX) {
+		wl12xx_warning("cmd vbm len is %d B, truncating to %d",
+			       bitmap_len, PARTIAL_VBM_MAX);
+		bitmap_len = PARTIAL_VBM_MAX;
+	}
+	memcpy(vbm.tim.pvb_field, bitmap, bitmap_len);
+	vbm.tim.identity = identity;
+	vbm.tim.length = bitmap_len + 3;
+
+	vbm.len = cpu_to_le16(bitmap_len + 5);
+
+	ret = wl12xx_cmd_send(wl, CMD_VBM, &vbm, sizeof(vbm));
+	if (ret < 0) {
+		wl12xx_error("VBM command failed");
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_cmd_data_path(struct wl12xx *wl, u8 channel, u8 enable)
+{
+	int ret;
+	u16 cmd_rx, cmd_tx;
+
+	wl12xx_debug(DEBUG_CMD, "cmd data path");
+
+	if (enable) {
+		cmd_rx = CMD_ENABLE_RX;
+		cmd_tx = CMD_ENABLE_TX;
+	} else {
+		cmd_rx = CMD_DISABLE_RX;
+		cmd_tx = CMD_DISABLE_TX;
+	}
+
+	ret = wl12xx_cmd_send(wl, cmd_rx, &channel, sizeof(channel));
+	if (ret < 0) {
+		wl12xx_error("rx %s cmd for channel %d failed",
+			     enable ? "start" : "stop", channel);
+		return ret;
+	}
+
+	wl12xx_debug(DEBUG_BOOT, "rx %s cmd channel %d",
+		     enable ? "start" : "stop", channel);
+
+	ret = wl12xx_cmd_send(wl, cmd_tx, &channel, sizeof(channel));
+	if (ret < 0) {
+		wl12xx_error("tx %s cmd for channel %d failed",
+			     enable ? "start" : "stop", channel);
+		return ret;
+	}
+
+	wl12xx_debug(DEBUG_BOOT, "tx %s cmd channel %d",
+		     enable ? "start" : "stop", channel);
+
+	return 0;
+}
+
+int wl12xx_cmd_join(struct wl12xx *wl, u8 bss_type, u8 dtim_interval,
+		    u16 beacon_interval, u8 wait)
+{
+	unsigned long timeout;
+	struct cmd_join join = {};
+	int ret, i;
+	u8 *bssid;
+
+	/* FIXME: this should be in main.c */
+	ret = wl12xx_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
+				     DEFAULT_HW_GEN_MODULATION_TYPE,
+				     wl->tx_mgmt_frm_rate,
+				     wl->tx_mgmt_frm_mod);
+	if (ret < 0)
+		return ret;
+
+	wl12xx_debug(DEBUG_CMD, "cmd join");
+
+	/* Reverse order BSSID */
+	bssid = (u8 *)&join.bssid_lsb;
+	for (i = 0; i < ETH_ALEN; i++)
+		bssid[i] = wl->bssid[ETH_ALEN - i - 1];
+
+	join.rx_config_options = wl->rx_config;
+	join.rx_filter_options = wl->rx_filter;
+
+	join.basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
+		RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;
+
+	join.beacon_interval = beacon_interval;
+	join.dtim_interval = dtim_interval;
+	join.bss_type = bss_type;
+	join.channel = wl->channel;
+	join.ctrl = JOIN_CMD_CTRL_TX_FLUSH;
+
+	ret = wl12xx_cmd_send(wl, CMD_START_JOIN, &join, sizeof(join));
+	if (ret < 0) {
+		wl12xx_error("failed to initiate cmd join");
+		return ret;
+	}
+
+	timeout = msecs_to_jiffies(JOIN_TIMEOUT);
+
+	/*
+	 * ugly hack: we should wait for JOIN_EVENT_COMPLETE_ID but to
+	 * simplify locking we just sleep instead, for now
+	 */
+	if (wait)
+		msleep(10);
+
+	return 0;
+}
+
+int wl12xx_cmd_ps_mode(struct wl12xx *wl, u8 ps_mode)
+{
+	int ret;
+	struct acx_ps_params ps_params;
+
+	/* FIXME: this should be in ps.c */
+	ret = wl12xx_acx_wake_up_conditions(wl, wl->listen_int);
+	if (ret < 0) {
+		wl12xx_error("Couldnt set wake up conditions");
+		return ret;
+	}
+
+	wl12xx_debug(DEBUG_CMD, "cmd set ps mode");
+
+	ps_params.ps_mode = ps_mode;
+	ps_params.send_null_data = 1;
+	ps_params.retries = 5;
+	ps_params.hang_over_period = 128;
+	ps_params.null_data_rate = 1; /* 1 Mbps */
+
+	ret = wl12xx_cmd_send(wl, CMD_SET_PS_MODE, &ps_params,
+			      sizeof(ps_params));
+	if (ret < 0) {
+		wl12xx_error("cmd set_ps_mode failed");
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_cmd_read_memory(struct wl12xx *wl, u32 addr, u32 len, void *answer)
+{
+	struct cmd_read_write_memory mem_cmd, *mem_answer;
+	struct wl12xx_command cmd;
+	int ret;
+
+	wl12xx_debug(DEBUG_CMD, "cmd read memory");
+
+	memset(&mem_cmd, 0, sizeof(mem_cmd));
+	mem_cmd.addr = addr;
+	mem_cmd.size = len;
+
+	ret = wl12xx_cmd_send(wl, CMD_READ_MEMORY, &mem_cmd, sizeof(mem_cmd));
+	if (ret < 0) {
+		wl12xx_error("read memory command failed: %d", ret);
+		return ret;
+	}
+
+	/* the read command got in, we can now read the answer */
+	wl12xx_spi_mem_read(wl, wl->cmd_box_addr, &cmd,
+			    CMDMBOX_HEADER_LEN + sizeof(mem_cmd));
+
+	if (cmd.status != CMD_STATUS_SUCCESS)
+		wl12xx_error("error in read command result: %d", cmd.status);
+
+	mem_answer = (struct cmd_read_write_memory *) cmd.parameters;
+	memcpy(answer, mem_answer->value, len);
+
+	return 0;
+}
+
+int wl12xx_cmd_template_set(struct wl12xx *wl, u16 cmd_id,
+			    void *buf, size_t buf_len)
+{
+	struct wl12xx_cmd_packet_template template;
+	int ret;
+
+	wl12xx_debug(DEBUG_CMD, "cmd template %d", cmd_id);
+
+	memset(&template, 0, sizeof(template));
+
+	WARN_ON(buf_len > WL12XX_MAX_TEMPLATE_SIZE);
+	buf_len = min_t(size_t, buf_len, WL12XX_MAX_TEMPLATE_SIZE);
+	template.size = cpu_to_le16(buf_len);
+
+	if (buf)
+		memcpy(template.template, buf, buf_len);
+
+	ret = wl12xx_cmd_send(wl, cmd_id, &template,
+			      sizeof(template.size) + buf_len);
+	if (ret < 0) {
+		wl12xx_warning("cmd set_template failed: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}