mac80211: add pending brcmfmac patch fixing warm reboots

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

Backport of r46739

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@46740 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 193 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/395-brcmfmac-Reset-PCIE-devices-after-recognition.patch b/package/kernel/mac80211/patches/395-brcmfmac-Reset-PCIE-devices-after-recognition.patch
new file mode 100644
index 0000000000..5a7e447e25
--- /dev/null
+++ b/package/kernel/mac80211/patches/395-brcmfmac-Reset-PCIE-devices-after-recognition.patch
@@ -0,0 +1,193 @@
+From: Hante Meuleman <meuleman@broadcom.com>
+Date: Thu, 27 Aug 2015 16:14:06 +0200
+Subject: [PATCH] brcmfmac: Reset PCIE devices after recognition.
+
+When PCIE type devices are being FW reloaded without being properly
+reset then the device ends up in a locked state, requiring the
+device to be completely powered down. This patch adds a reset
+through watchdog at the moment the device (cores) has been
+recognized. This will solve warm reboot issues.
+
+Cc: Rafal Milecki <zajec5@gmail.com>
+Reviewed-by: Arend Van Spriel <arend@broadcom.com>
+Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
+Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
+Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
+Signed-off-by: Arend van Spriel <arend@broadcom.com>
+---
+
+--- a/drivers/net/wireless/brcm80211/brcmfmac/chip.c
++++ b/drivers/net/wireless/brcm80211/brcmfmac/chip.c
+@@ -101,6 +101,9 @@
+ /* ARM Cortex M3 core, ID 0x82a */
+ #define BCM4329_CORE_ARM_BASE		0x18002000
+ 
++/* Max possibly supported memory size (limited by IO mapped memory) */
++#define BRCMF_CHIP_MAX_MEMSIZE		(4 * 1024 * 1024)
++
+ #define CORE_SB(base, field) \
+ 		(base + SBCONFIGOFF + offsetof(struct sbconfig, field))
+ #define	SBCOREREV(sbidh) \
+@@ -687,6 +690,12 @@ static int brcmf_chip_get_raminfo(struct
+ 		brcmf_err("RAM size is undetermined\n");
+ 		return -ENOMEM;
+ 	}
++
++	if (ci->pub.ramsize > BRCMF_CHIP_MAX_MEMSIZE) {
++		brcmf_err("RAM size is incorrect\n");
++		return -ENOMEM;
++	}
++
+ 	return 0;
+ }
+ 
+@@ -899,6 +908,15 @@ static int brcmf_chip_recognition(struct
+ 
+ 	/* assure chip is passive for core access */
+ 	brcmf_chip_set_passive(&ci->pub);
++
++	/* Call bus specific reset function now. Cores have been determined
++	 * but further access may require a chip specific reset at this point.
++	 */
++	if (ci->ops->reset) {
++		ci->ops->reset(ci->ctx, &ci->pub);
++		brcmf_chip_set_passive(&ci->pub);
++	}
++
+ 	return brcmf_chip_get_raminfo(ci);
+ }
+ 
+--- a/drivers/net/wireless/brcm80211/brcmfmac/chip.h
++++ b/drivers/net/wireless/brcm80211/brcmfmac/chip.h
+@@ -73,6 +73,7 @@ struct brcmf_buscore_ops {
+ 	u32 (*read32)(void *ctx, u32 addr);
+ 	void (*write32)(void *ctx, u32 addr, u32 value);
+ 	int (*prepare)(void *ctx);
++	int (*reset)(void *ctx, struct brcmf_chip *chip);
+ 	int (*setup)(void *ctx, struct brcmf_chip *chip);
+ 	void (*activate)(void *ctx, struct brcmf_chip *chip, u32 rstvec);
+ };
+--- a/drivers/net/wireless/brcm80211/brcmfmac/pcie.c
++++ b/drivers/net/wireless/brcm80211/brcmfmac/pcie.c
+@@ -74,6 +74,8 @@ enum brcmf_pcie_state {
+ #define BRCMF_PCIE_REG_INTMASK			0x94
+ #define BRCMF_PCIE_REG_SBMBX			0x98
+ 
++#define BRCMF_PCIE_REG_LINK_STATUS_CTRL		0xBC
++
+ #define BRCMF_PCIE_PCIE2REG_INTMASK		0x24
+ #define BRCMF_PCIE_PCIE2REG_MAILBOXINT		0x48
+ #define BRCMF_PCIE_PCIE2REG_MAILBOXMASK		0x4C
+@@ -466,6 +468,7 @@ brcmf_pcie_select_core(struct brcmf_pcie
+ 
+ static void brcmf_pcie_reset_device(struct brcmf_pciedev_info *devinfo)
+ {
++	struct brcmf_core *core;
+ 	u16 cfg_offset[] = { BRCMF_PCIE_CFGREG_STATUS_CMD,
+ 			     BRCMF_PCIE_CFGREG_PM_CSR,
+ 			     BRCMF_PCIE_CFGREG_MSI_CAP,
+@@ -484,32 +487,38 @@ static void brcmf_pcie_reset_device(stru
+ 	if (!devinfo->ci)
+ 		return;
+ 
++	/* Disable ASPM */
+ 	brcmf_pcie_select_core(devinfo, BCMA_CORE_PCIE2);
+-	brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGADDR,
+-			       BRCMF_PCIE_CFGREG_LINK_STATUS_CTRL);
+-	lsc = brcmf_pcie_read_reg32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGDATA);
++	pci_read_config_dword(devinfo->pdev, BRCMF_PCIE_REG_LINK_STATUS_CTRL,
++			      &lsc);
+ 	val = lsc & (~BRCMF_PCIE_LINK_STATUS_CTRL_ASPM_ENAB);
+-	brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGDATA, val);
++	pci_write_config_dword(devinfo->pdev, BRCMF_PCIE_REG_LINK_STATUS_CTRL,
++			       val);
+ 
++	/* Watchdog reset */
+ 	brcmf_pcie_select_core(devinfo, BCMA_CORE_CHIPCOMMON);
+ 	WRITECC32(devinfo, watchdog, 4);
+ 	msleep(100);
+ 
++	/* Restore ASPM */
+ 	brcmf_pcie_select_core(devinfo, BCMA_CORE_PCIE2);
+-	brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGADDR,
+-			       BRCMF_PCIE_CFGREG_LINK_STATUS_CTRL);
+-	brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGDATA, lsc);
++	pci_write_config_dword(devinfo->pdev, BRCMF_PCIE_REG_LINK_STATUS_CTRL,
++			       lsc);
+ 
+-	brcmf_pcie_select_core(devinfo, BCMA_CORE_PCIE2);
+-	for (i = 0; i < ARRAY_SIZE(cfg_offset); i++) {
+-		brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGADDR,
+-				       cfg_offset[i]);
+-		val = brcmf_pcie_read_reg32(devinfo,
+-					    BRCMF_PCIE_PCIE2REG_CONFIGDATA);
+-		brcmf_dbg(PCIE, "config offset 0x%04x, value 0x%04x\n",
+-			  cfg_offset[i], val);
+-		brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGDATA,
+-				       val);
++	core = brcmf_chip_get_core(devinfo->ci, BCMA_CORE_PCIE2);
++	if (core->rev <= 13) {
++		for (i = 0; i < ARRAY_SIZE(cfg_offset); i++) {
++			brcmf_pcie_write_reg32(devinfo,
++					       BRCMF_PCIE_PCIE2REG_CONFIGADDR,
++					       cfg_offset[i]);
++			val = brcmf_pcie_read_reg32(devinfo,
++				BRCMF_PCIE_PCIE2REG_CONFIGDATA);
++			brcmf_dbg(PCIE, "config offset 0x%04x, value 0x%04x\n",
++				  cfg_offset[i], val);
++			brcmf_pcie_write_reg32(devinfo,
++					       BRCMF_PCIE_PCIE2REG_CONFIGDATA,
++					       val);
++		}
+ 	}
+ }
+ 
+@@ -519,8 +528,6 @@ static void brcmf_pcie_attach(struct brc
+ 	u32 config;
+ 
+ 	brcmf_pcie_select_core(devinfo, BCMA_CORE_PCIE2);
+-	if (brcmf_pcie_read_reg32(devinfo, BRCMF_PCIE_PCIE2REG_INTMASK) != 0)
+-		brcmf_pcie_reset_device(devinfo);
+ 	/* BAR1 window may not be sized properly */
+ 	brcmf_pcie_select_core(devinfo, BCMA_CORE_PCIE2);
+ 	brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGADDR, 0x4e0);
+@@ -1636,6 +1643,23 @@ static int brcmf_pcie_buscoreprep(void *
+ }
+ 
+ 
++static int brcmf_pcie_buscore_reset(void *ctx, struct brcmf_chip *chip)
++{
++	struct brcmf_pciedev_info *devinfo = (struct brcmf_pciedev_info *)ctx;
++	u32 val;
++
++	devinfo->ci = chip;
++	brcmf_pcie_reset_device(devinfo);
++
++	val = brcmf_pcie_read_reg32(devinfo, BRCMF_PCIE_PCIE2REG_MAILBOXINT);
++	if (val != 0xffffffff)
++		brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_MAILBOXINT,
++				       val);
++
++	return 0;
++}
++
++
+ static void brcmf_pcie_buscore_activate(void *ctx, struct brcmf_chip *chip,
+ 					u32 rstvec)
+ {
+@@ -1647,6 +1671,7 @@ static void brcmf_pcie_buscore_activate(
+ 
+ static const struct brcmf_buscore_ops brcmf_pcie_buscore_ops = {
+ 	.prepare = brcmf_pcie_buscoreprep,
++	.reset = brcmf_pcie_buscore_reset,
+ 	.activate = brcmf_pcie_buscore_activate,
+ 	.read32 = brcmf_pcie_buscore_read32,
+ 	.write32 = brcmf_pcie_buscore_write32,
+@@ -1814,7 +1839,6 @@ brcmf_pcie_remove(struct pci_dev *pdev)
+ 		brcmf_pcie_intr_disable(devinfo);
+ 
+ 	brcmf_detach(&pdev->dev);
+-	brcmf_pcie_reset_device(devinfo);
+ 
+ 	kfree(bus->bus_priv.pcie);
+ 	kfree(bus->msgbuf->flowrings);