Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 555 insertions, 0 deletions

diff --git a/kernel/drivers/net/wireless/ti/wl1251/boot.c b/kernel/drivers/net/wireless/ti/wl1251/boot.c
new file mode 100644
index 000000000..2000cd536
--- /dev/null
+++ b/kernel/drivers/net/wireless/ti/wl1251/boot.c
@@ -0,0 +1,555 @@
+/*
+ * This file is part of wl1251
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/slab.h>
+
+#include "reg.h"
+#include "boot.h"
+#include "io.h"
+#include "spi.h"
+#include "event.h"
+#include "acx.h"
+
+void wl1251_boot_target_enable_interrupts(struct wl1251 *wl)
+{
+	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
+	wl1251_reg_write32(wl, HI_CFG, HI_CFG_DEF_VAL);
+}
+
+int wl1251_boot_soft_reset(struct wl1251 *wl)
+{
+	unsigned long timeout;
+	u32 boot_data;
+
+	/* perform soft reset */
+	wl1251_reg_write32(wl, ACX_REG_SLV_SOFT_RESET, ACX_SLV_SOFT_RESET_BIT);
+
+	/* SOFT_RESET is self clearing */
+	timeout = jiffies + usecs_to_jiffies(SOFT_RESET_MAX_TIME);
+	while (1) {
+		boot_data = wl1251_reg_read32(wl, ACX_REG_SLV_SOFT_RESET);
+		wl1251_debug(DEBUG_BOOT, "soft reset bootdata 0x%x", boot_data);
+		if ((boot_data & ACX_SLV_SOFT_RESET_BIT) == 0)
+			break;
+
+		if (time_after(jiffies, timeout)) {
+			/* 1.2 check pWhalBus->uSelfClearTime if the
+			 * timeout was reached */
+			wl1251_error("soft reset timeout");
+			return -1;
+		}
+
+		udelay(SOFT_RESET_STALL_TIME);
+	}
+
+	/* disable Rx/Tx */
+	wl1251_reg_write32(wl, ENABLE, 0x0);
+
+	/* disable auto calibration on start*/
+	wl1251_reg_write32(wl, SPARE_A2, 0xffff);
+
+	return 0;
+}
+
+int wl1251_boot_init_seq(struct wl1251 *wl)
+{
+	u32 scr_pad6, init_data, tmp, elp_cmd, ref_freq;
+
+	/*
+	 * col #1: INTEGER_DIVIDER
+	 * col #2: FRACTIONAL_DIVIDER
+	 * col #3: ATTN_BB
+	 * col #4: ALPHA_BB
+	 * col #5: STOP_TIME_BB
+	 * col #6: BB_PLL_LOOP_FILTER
+	 */
+	static const u32 LUT[REF_FREQ_NUM][LUT_PARAM_NUM] = {
+
+		{   83, 87381,  0xB, 5, 0xF00,  3}, /* REF_FREQ_19_2*/
+		{   61, 141154, 0xB, 5, 0x1450, 2}, /* REF_FREQ_26_0*/
+		{   41, 174763, 0xC, 6, 0x2D00, 1}, /* REF_FREQ_38_4*/
+		{   40, 0,      0xC, 6, 0x2EE0, 1}, /* REF_FREQ_40_0*/
+		{   47, 162280, 0xC, 6, 0x2760, 1}  /* REF_FREQ_33_6        */
+	};
+
+	/* read NVS params */
+	scr_pad6 = wl1251_reg_read32(wl, SCR_PAD6);
+	wl1251_debug(DEBUG_BOOT, "scr_pad6 0x%x", scr_pad6);
+
+	/* read ELP_CMD */
+	elp_cmd = wl1251_reg_read32(wl, ELP_CMD);
+	wl1251_debug(DEBUG_BOOT, "elp_cmd 0x%x", elp_cmd);
+
+	/* set the BB calibration time to be 300 usec (PLL_CAL_TIME) */
+	ref_freq = scr_pad6 & 0x000000FF;
+	wl1251_debug(DEBUG_BOOT, "ref_freq 0x%x", ref_freq);
+
+	wl1251_reg_write32(wl, PLL_CAL_TIME, 0x9);
+
+	/*
+	 * PG 1.2: set the clock buffer time to be 210 usec (CLK_BUF_TIME)
+	 */
+	wl1251_reg_write32(wl, CLK_BUF_TIME, 0x6);
+
+	/*
+	 * set the clock detect feature to work in the restart wu procedure
+	 * (ELP_CFG_MODE[14]) and Select the clock source type
+	 * (ELP_CFG_MODE[13:12])
+	 */
+	tmp = ((scr_pad6 & 0x0000FF00) << 4) | 0x00004000;
+	wl1251_reg_write32(wl, ELP_CFG_MODE, tmp);
+
+	/* PG 1.2: enable the BB PLL fix. Enable the PLL_LIMP_CLK_EN_CMD */
+	elp_cmd |= 0x00000040;
+	wl1251_reg_write32(wl, ELP_CMD, elp_cmd);
+
+	/* PG 1.2: Set the BB PLL stable time to be 1000usec
+	 * (PLL_STABLE_TIME) */
+	wl1251_reg_write32(wl, CFG_PLL_SYNC_CNT, 0x20);
+
+	/* PG 1.2: read clock request time */
+	init_data = wl1251_reg_read32(wl, CLK_REQ_TIME);
+
+	/*
+	 * PG 1.2: set the clock request time to be ref_clk_settling_time -
+	 * 1ms = 4ms
+	 */
+	if (init_data > 0x21)
+		tmp = init_data - 0x21;
+	else
+		tmp = 0;
+	wl1251_reg_write32(wl, CLK_REQ_TIME, tmp);
+
+	/* set BB PLL configurations in RF AFE */
+	wl1251_reg_write32(wl, 0x003058cc, 0x4B5);
+
+	/* set RF_AFE_REG_5 */
+	wl1251_reg_write32(wl, 0x003058d4, 0x50);
+
+	/* set RF_AFE_CTRL_REG_2 */
+	wl1251_reg_write32(wl, 0x00305948, 0x11c001);
+
+	/*
+	 * change RF PLL and BB PLL divider for VCO clock and adjust VCO
+	 * bais current(RF_AFE_REG_13)
+	 */
+	wl1251_reg_write32(wl, 0x003058f4, 0x1e);
+
+	/* set BB PLL configurations */
+	tmp = LUT[ref_freq][LUT_PARAM_INTEGER_DIVIDER] | 0x00017000;
+	wl1251_reg_write32(wl, 0x00305840, tmp);
+
+	/* set fractional divider according to Appendix C-BB PLL
+	 * Calculations
+	 */
+	tmp = LUT[ref_freq][LUT_PARAM_FRACTIONAL_DIVIDER];
+	wl1251_reg_write32(wl, 0x00305844, tmp);
+
+	/* set the initial data for the sigma delta */
+	wl1251_reg_write32(wl, 0x00305848, 0x3039);
+
+	/*
+	 * set the accumulator attenuation value, calibration loop1
+	 * (alpha), calibration loop2 (beta), calibration loop3 (gamma) and
+	 * the VCO gain
+	 */
+	tmp = (LUT[ref_freq][LUT_PARAM_ATTN_BB] << 16) |
+		(LUT[ref_freq][LUT_PARAM_ALPHA_BB] << 12) | 0x1;
+	wl1251_reg_write32(wl, 0x00305854, tmp);
+
+	/*
+	 * set the calibration stop time after holdoff time expires and set
+	 * settling time HOLD_OFF_TIME_BB
+	 */
+	tmp = LUT[ref_freq][LUT_PARAM_STOP_TIME_BB] | 0x000A0000;
+	wl1251_reg_write32(wl, 0x00305858, tmp);
+
+	/*
+	 * set BB PLL Loop filter capacitor3- BB_C3[2:0] and set BB PLL
+	 * constant leakage current to linearize PFD to 0uA -
+	 * BB_ILOOPF[7:3]
+	 */
+	tmp = LUT[ref_freq][LUT_PARAM_BB_PLL_LOOP_FILTER] | 0x00000030;
+	wl1251_reg_write32(wl, 0x003058f8, tmp);
+
+	/*
+	 * set regulator output voltage for n divider to
+	 * 1.35-BB_REFDIV[1:0], set charge pump current- BB_CPGAIN[4:2],
+	 * set BB PLL Loop filter capacitor2- BB_C2[7:5], set gain of BB
+	 * PLL auto-call to normal mode- BB_CALGAIN_3DB[8]
+	 */
+	wl1251_reg_write32(wl, 0x003058f0, 0x29);
+
+	/* enable restart wakeup sequence (ELP_CMD[0]) */
+	wl1251_reg_write32(wl, ELP_CMD, elp_cmd | 0x1);
+
+	/* restart sequence completed */
+	udelay(2000);
+
+	return 0;
+}
+
+static void wl1251_boot_set_ecpu_ctrl(struct wl1251 *wl, u32 flag)
+{
+	u32 cpu_ctrl;
+
+	/* 10.5.0 run the firmware (I) */
+	cpu_ctrl = wl1251_reg_read32(wl, ACX_REG_ECPU_CONTROL);
+
+	/* 10.5.1 run the firmware (II) */
+	cpu_ctrl &= ~flag;
+	wl1251_reg_write32(wl, ACX_REG_ECPU_CONTROL, cpu_ctrl);
+}
+
+int wl1251_boot_run_firmware(struct wl1251 *wl)
+{
+	int loop, ret;
+	u32 chip_id, acx_intr;
+
+	wl1251_boot_set_ecpu_ctrl(wl, ECPU_CONTROL_HALT);
+
+	chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
+
+	wl1251_debug(DEBUG_BOOT, "chip id after firmware boot: 0x%x", chip_id);
+
+	if (chip_id != wl->chip_id) {
+		wl1251_error("chip id doesn't match after firmware boot");
+		return -EIO;
+	}
+
+	/* wait for init to complete */
+	loop = 0;
+	while (loop++ < INIT_LOOP) {
+		udelay(INIT_LOOP_DELAY);
+		acx_intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
+
+		if (acx_intr == 0xffffffff) {
+			wl1251_error("error reading hardware complete "
+				     "init indication");
+			return -EIO;
+		}
+		/* check that ACX_INTR_INIT_COMPLETE is enabled */
+		else if (acx_intr & WL1251_ACX_INTR_INIT_COMPLETE) {
+			wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
+					   WL1251_ACX_INTR_INIT_COMPLETE);
+			break;
+		}
+	}
+
+	if (loop > INIT_LOOP) {
+		wl1251_error("timeout waiting for the hardware to "
+			     "complete initialization");
+		return -EIO;
+	}
+
+	/* get hardware config command mail box */
+	wl->cmd_box_addr = wl1251_reg_read32(wl, REG_COMMAND_MAILBOX_PTR);
+
+	/* get hardware config event mail box */
+	wl->event_box_addr = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
+
+	/* set the working partition to its "running" mode offset */
+	wl1251_set_partition(wl, WL1251_PART_WORK_MEM_START,
+			     WL1251_PART_WORK_MEM_SIZE,
+			     WL1251_PART_WORK_REG_START,
+			     WL1251_PART_WORK_REG_SIZE);
+
+	wl1251_debug(DEBUG_MAILBOX, "cmd_box_addr 0x%x event_box_addr 0x%x",
+		     wl->cmd_box_addr, wl->event_box_addr);
+
+	wl1251_acx_fw_version(wl, wl->fw_ver, sizeof(wl->fw_ver));
+
+	/*
+	 * in case of full asynchronous mode the firmware event must be
+	 * ready to receive event from the command mailbox
+	 */
+
+	/* enable gpio interrupts */
+	wl1251_enable_interrupts(wl);
+
+	/* Enable target's interrupts */
+	wl->intr_mask = WL1251_ACX_INTR_RX0_DATA |
+		WL1251_ACX_INTR_RX1_DATA |
+		WL1251_ACX_INTR_TX_RESULT |
+		WL1251_ACX_INTR_EVENT_A |
+		WL1251_ACX_INTR_EVENT_B |
+		WL1251_ACX_INTR_INIT_COMPLETE;
+	wl1251_boot_target_enable_interrupts(wl);
+
+	wl->event_mask = SCAN_COMPLETE_EVENT_ID | BSS_LOSE_EVENT_ID |
+		SYNCHRONIZATION_TIMEOUT_EVENT_ID |
+		ROAMING_TRIGGER_LOW_RSSI_EVENT_ID |
+		ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID |
+		REGAINED_BSS_EVENT_ID | BT_PTA_SENSE_EVENT_ID |
+		BT_PTA_PREDICTION_EVENT_ID | JOIN_EVENT_COMPLETE_ID |
+		PS_REPORT_EVENT_ID;
+
+	ret = wl1251_event_unmask(wl);
+	if (ret < 0) {
+		wl1251_error("EVENT mask setting failed");
+		return ret;
+	}
+
+	wl1251_event_mbox_config(wl);
+
+	/* firmware startup completed */
+	return 0;
+}
+
+static int wl1251_boot_upload_firmware(struct wl1251 *wl)
+{
+	int addr, chunk_num, partition_limit;
+	size_t fw_data_len, len;
+	u8 *p, *buf;
+
+	/* whal_FwCtrl_LoadFwImageSm() */
+
+	wl1251_debug(DEBUG_BOOT, "chip id before fw upload: 0x%x",
+		     wl1251_reg_read32(wl, CHIP_ID_B));
+
+	/* 10.0 check firmware length and set partition */
+	fw_data_len =  (wl->fw[4] << 24) | (wl->fw[5] << 16) |
+		(wl->fw[6] << 8) | (wl->fw[7]);
+
+	wl1251_debug(DEBUG_BOOT, "fw_data_len %zu chunk_size %d", fw_data_len,
+		CHUNK_SIZE);
+
+	if ((fw_data_len % 4) != 0) {
+		wl1251_error("firmware length not multiple of four");
+		return -EIO;
+	}
+
+	buf = kmalloc(CHUNK_SIZE, GFP_KERNEL);
+	if (!buf) {
+		wl1251_error("allocation for firmware upload chunk failed");
+		return -ENOMEM;
+	}
+
+	wl1251_set_partition(wl, WL1251_PART_DOWN_MEM_START,
+			     WL1251_PART_DOWN_MEM_SIZE,
+			     WL1251_PART_DOWN_REG_START,
+			     WL1251_PART_DOWN_REG_SIZE);
+
+	/* 10.1 set partition limit and chunk num */
+	chunk_num = 0;
+	partition_limit = WL1251_PART_DOWN_MEM_SIZE;
+
+	while (chunk_num < fw_data_len / CHUNK_SIZE) {
+		/* 10.2 update partition, if needed */
+		addr = WL1251_PART_DOWN_MEM_START +
+			(chunk_num + 2) * CHUNK_SIZE;
+		if (addr > partition_limit) {
+			addr = WL1251_PART_DOWN_MEM_START +
+				chunk_num * CHUNK_SIZE;
+			partition_limit = chunk_num * CHUNK_SIZE +
+				WL1251_PART_DOWN_MEM_SIZE;
+			wl1251_set_partition(wl,
+					     addr,
+					     WL1251_PART_DOWN_MEM_SIZE,
+					     WL1251_PART_DOWN_REG_START,
+					     WL1251_PART_DOWN_REG_SIZE);
+		}
+
+		/* 10.3 upload the chunk */
+		addr = WL1251_PART_DOWN_MEM_START + chunk_num * CHUNK_SIZE;
+		p = wl->fw + FW_HDR_SIZE + chunk_num * CHUNK_SIZE;
+		wl1251_debug(DEBUG_BOOT, "uploading fw chunk 0x%p to 0x%x",
+			     p, addr);
+
+		/* need to copy the chunk for dma */
+		len = CHUNK_SIZE;
+		memcpy(buf, p, len);
+		wl1251_mem_write(wl, addr, buf, len);
+
+		chunk_num++;
+	}
+
+	/* 10.4 upload the last chunk */
+	addr = WL1251_PART_DOWN_MEM_START + chunk_num * CHUNK_SIZE;
+	p = wl->fw + FW_HDR_SIZE + chunk_num * CHUNK_SIZE;
+
+	/* need to copy the chunk for dma */
+	len = fw_data_len % CHUNK_SIZE;
+	memcpy(buf, p, len);
+
+	wl1251_debug(DEBUG_BOOT, "uploading fw last chunk (%zu B) 0x%p to 0x%x",
+		     len, p, addr);
+	wl1251_mem_write(wl, addr, buf, len);
+
+	kfree(buf);
+
+	return 0;
+}
+
+static int wl1251_boot_upload_nvs(struct wl1251 *wl)
+{
+	size_t nvs_len, nvs_bytes_written, burst_len;
+	int nvs_start, i;
+	u32 dest_addr, val;
+	u8 *nvs_ptr, *nvs;
+
+	nvs = wl->nvs;
+	if (nvs == NULL)
+		return -ENODEV;
+
+	nvs_ptr = nvs;
+
+	nvs_len = wl->nvs_len;
+	nvs_start = wl->fw_len;
+
+	/*
+	 * Layout before the actual NVS tables:
+	 * 1 byte : burst length.
+	 * 2 bytes: destination address.
+	 * n bytes: data to burst copy.
+	 *
+	 * This is ended by a 0 length, then the NVS tables.
+	 */
+
+	while (nvs_ptr[0]) {
+		burst_len = nvs_ptr[0];
+		dest_addr = (nvs_ptr[1] & 0xfe) | ((u32)(nvs_ptr[2] << 8));
+
+		/* We move our pointer to the data */
+		nvs_ptr += 3;
+
+		for (i = 0; i < burst_len; i++) {
+			val = (nvs_ptr[0] | (nvs_ptr[1] << 8)
+			       | (nvs_ptr[2] << 16) | (nvs_ptr[3] << 24));
+
+			wl1251_debug(DEBUG_BOOT,
+				     "nvs burst write 0x%x: 0x%x",
+				     dest_addr, val);
+			wl1251_mem_write32(wl, dest_addr, val);
+
+			nvs_ptr += 4;
+			dest_addr += 4;
+		}
+	}
+
+	/*
+	 * We've reached the first zero length, the first NVS table
+	 * is 7 bytes further.
+	 */
+	nvs_ptr += 7;
+	nvs_len -= nvs_ptr - nvs;
+	nvs_len = ALIGN(nvs_len, 4);
+
+	/* Now we must set the partition correctly */
+	wl1251_set_partition(wl, nvs_start,
+			     WL1251_PART_DOWN_MEM_SIZE,
+			     WL1251_PART_DOWN_REG_START,
+			     WL1251_PART_DOWN_REG_SIZE);
+
+	/* And finally we upload the NVS tables */
+	nvs_bytes_written = 0;
+	while (nvs_bytes_written < nvs_len) {
+		val = (nvs_ptr[0] | (nvs_ptr[1] << 8)
+		       | (nvs_ptr[2] << 16) | (nvs_ptr[3] << 24));
+
+		wl1251_debug(DEBUG_BOOT,
+			     "nvs write table 0x%x: 0x%x",
+			     nvs_start, val);
+		wl1251_mem_write32(wl, nvs_start, val);
+
+		nvs_ptr += 4;
+		nvs_bytes_written += 4;
+		nvs_start += 4;
+	}
+
+	return 0;
+}
+
+int wl1251_boot(struct wl1251 *wl)
+{
+	int ret = 0, minor_minor_e2_ver;
+	u32 tmp, boot_data;
+
+	/* halt embedded ARM CPU while loading firmware */
+	wl1251_reg_write32(wl, ACX_REG_ECPU_CONTROL, ECPU_CONTROL_HALT);
+
+	ret = wl1251_boot_soft_reset(wl);
+	if (ret < 0)
+		goto out;
+
+	/* 2. start processing NVS file */
+	if (wl->use_eeprom) {
+		wl1251_reg_write32(wl, ACX_REG_EE_START, START_EEPROM_MGR);
+		/* Wait for EEPROM NVS burst read to complete */
+		msleep(40);
+		wl1251_reg_write32(wl, ACX_EEPROMLESS_IND_REG, USE_EEPROM);
+	} else {
+		ret = wl1251_boot_upload_nvs(wl);
+		if (ret < 0)
+			goto out;
+
+		/* write firmware's last address (ie. it's length) to
+		 * ACX_EEPROMLESS_IND_REG */
+		wl1251_reg_write32(wl, ACX_EEPROMLESS_IND_REG, wl->fw_len);
+	}
+
+	/* 6. read the EEPROM parameters */
+	tmp = wl1251_reg_read32(wl, SCR_PAD2);
+
+	/* 7. read bootdata */
+	wl->boot_attr.radio_type = (tmp & 0x0000FF00) >> 8;
+	wl->boot_attr.major = (tmp & 0x00FF0000) >> 16;
+	tmp = wl1251_reg_read32(wl, SCR_PAD3);
+
+	/* 8. check bootdata and call restart sequence */
+	wl->boot_attr.minor = (tmp & 0x00FF0000) >> 16;
+	minor_minor_e2_ver = (tmp & 0xFF000000) >> 24;
+
+	wl1251_debug(DEBUG_BOOT, "radioType 0x%x majorE2Ver 0x%x "
+		     "minorE2Ver 0x%x minor_minor_e2_ver 0x%x",
+		     wl->boot_attr.radio_type, wl->boot_attr.major,
+		     wl->boot_attr.minor, minor_minor_e2_ver);
+
+	ret = wl1251_boot_init_seq(wl);
+	if (ret < 0)
+		goto out;
+
+	/* 9. NVS processing done */
+	boot_data = wl1251_reg_read32(wl, ACX_REG_ECPU_CONTROL);
+
+	wl1251_debug(DEBUG_BOOT, "halt boot_data 0x%x", boot_data);
+
+	/* 10. check that ECPU_CONTROL_HALT bits are set in
+	 * pWhalBus->uBootData and start uploading firmware
+	 */
+	if ((boot_data & ECPU_CONTROL_HALT) == 0) {
+		wl1251_error("boot failed, ECPU_CONTROL_HALT not set");
+		ret = -EIO;
+		goto out;
+	}
+
+	ret = wl1251_boot_upload_firmware(wl);
+	if (ret < 0)
+		goto out;
+
+	/* 10.5 start firmware */
+	ret = wl1251_boot_run_firmware(wl);
+	if (ret < 0)
+		goto out;
+
+out:
+	return ret;
+}