ar71xx: add support for QCA953x SoC

I don't have access to the specs, so I'm not sure about every detail, but I
haven't seen any problems with my test system, a TL-WR841N v9. It looks pretty
much like a QCA955x without PCI, a little twist in the clock calculation and
a AR9331-compatible switch.

Features not yet supported:

* EHCI (my test system doesn't have USB)
* ? (I have no idea if the QCA953x has any other features I don't know about
that aren't used by the TL-WR841N v9)

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

SVN-Revision: 40399

1 files changed, 406 insertions, 0 deletions

diff --git a/target/linux/ar71xx/patches-3.10/707-MIPS-ath79-add-support-for-QCA953x-SoC.patch b/target/linux/ar71xx/patches-3.10/707-MIPS-ath79-add-support-for-QCA953x-SoC.patch
new file mode 100644
index 0000000000..05ef22bdb5
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.10/707-MIPS-ath79-add-support-for-QCA953x-SoC.patch
@@ -0,0 +1,406 @@
+From 5300a7cd7ed2f88488ddba62947b9c6bb9663777 Mon Sep 17 00:00:00 2001
+Message-Id: <5300a7cd7ed2f88488ddba62947b9c6bb9663777.1396122227.git.mschiffer@universe-factory.net>
+From: Matthias Schiffer <mschiffer@universe-factory.net>
+Date: Sat, 29 Mar 2014 20:26:08 +0100
+Subject: [PATCH 1/2] MIPS: ath79: add support for QCA953x SoC
+
+Note that the clock calculation looks very similar to the QCA955x, but the
+meaning of the bits CPUCLK_FROM_CPUPLL and DDRCLK_FROM_DDRPLL is reversed.
+---
+ arch/mips/ath79/Kconfig                        |  6 +-
+ arch/mips/ath79/clock.c                        | 78 ++++++++++++++++++++++++++
+ arch/mips/ath79/common.c                       |  4 ++
+ arch/mips/ath79/dev-common.c                   |  1 +
+ arch/mips/ath79/dev-wmac.c                     | 20 +++++++
+ arch/mips/ath79/early_printk.c                 |  1 +
+ arch/mips/ath79/gpio.c                         |  4 +-
+ arch/mips/ath79/irq.c                          |  4 ++
+ arch/mips/ath79/setup.c                        |  8 ++-
+ arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 48 ++++++++++++++++
+ arch/mips/include/asm/mach-ath79/ath79.h       | 11 ++++
+ 11 files changed, 182 insertions(+), 3 deletions(-)
+
+--- a/arch/mips/ath79/Kconfig
++++ b/arch/mips/ath79/Kconfig
+@@ -929,6 +929,10 @@ config SOC_AR934X
+ 	select PCI_AR724X if PCI
+ 	def_bool n
+ 
++config SOC_QCA953X
++	select USB_ARCH_HAS_EHCI
++	def_bool n
++
+ config SOC_QCA955X
+ 	select USB_ARCH_HAS_EHCI
+ 	select HW_HAS_PCI
+@@ -972,7 +976,7 @@ config ATH79_DEV_USB
+ 	def_bool n
+ 
+ config ATH79_DEV_WMAC
+-	depends on (SOC_AR913X || SOC_AR933X || SOC_AR934X || SOC_QCA955X)
++	depends on (SOC_AR913X || SOC_AR933X || SOC_AR934X || SOC_QCA953X || SOC_QCA955X)
+ 	def_bool n
+ 
+ config ATH79_NVRAM
+--- a/arch/mips/ath79/clock.c
++++ b/arch/mips/ath79/clock.c
+@@ -295,6 +295,82 @@ static void __init ar934x_clocks_init(vo
+ 	iounmap(dpll_base);
+ }
+ 
++static void __init qca953x_clocks_init(void)
++{
++	u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv;
++	u32 cpu_pll, ddr_pll;
++	u32 bootstrap;
++
++	bootstrap = ath79_reset_rr(QCA953X_RESET_REG_BOOTSTRAP);
++	if (bootstrap &	QCA953X_BOOTSTRAP_REF_CLK_40)
++		ath79_ref_clk.rate = 40 * 1000 * 1000;
++	else
++		ath79_ref_clk.rate = 25 * 1000 * 1000;
++
++	pll = ath79_pll_rr(QCA953X_PLL_CPU_CONFIG_REG);
++	out_div = (pll >> QCA953X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
++		  QCA953X_PLL_CPU_CONFIG_OUTDIV_MASK;
++	ref_div = (pll >> QCA953X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
++		  QCA953X_PLL_CPU_CONFIG_REFDIV_MASK;
++	nint = (pll >> QCA953X_PLL_CPU_CONFIG_NINT_SHIFT) &
++	       QCA953X_PLL_CPU_CONFIG_NINT_MASK;
++	frac = (pll >> QCA953X_PLL_CPU_CONFIG_NFRAC_SHIFT) &
++	       QCA953X_PLL_CPU_CONFIG_NFRAC_MASK;
++
++	cpu_pll = nint * ath79_ref_clk.rate / ref_div;
++	cpu_pll += frac * (ath79_ref_clk.rate >> 6) / ref_div;
++	cpu_pll /= (1 << out_div);
++
++	pll = ath79_pll_rr(QCA953X_PLL_DDR_CONFIG_REG);
++	out_div = (pll >> QCA953X_PLL_DDR_CONFIG_OUTDIV_SHIFT) &
++		  QCA953X_PLL_DDR_CONFIG_OUTDIV_MASK;
++	ref_div = (pll >> QCA953X_PLL_DDR_CONFIG_REFDIV_SHIFT) &
++		  QCA953X_PLL_DDR_CONFIG_REFDIV_MASK;
++	nint = (pll >> QCA953X_PLL_DDR_CONFIG_NINT_SHIFT) &
++	       QCA953X_PLL_DDR_CONFIG_NINT_MASK;
++	frac = (pll >> QCA953X_PLL_DDR_CONFIG_NFRAC_SHIFT) &
++	       QCA953X_PLL_DDR_CONFIG_NFRAC_MASK;
++
++	ddr_pll = nint * ath79_ref_clk.rate / ref_div;
++	ddr_pll += frac * (ath79_ref_clk.rate >> 6) / (ref_div << 4);
++	ddr_pll /= (1 << out_div);
++
++	clk_ctrl = ath79_pll_rr(QCA953X_PLL_CLK_CTRL_REG);
++
++	postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) &
++		  QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_MASK;
++
++	if (clk_ctrl & QCA953X_PLL_CLK_CTRL_CPU_PLL_BYPASS)
++		ath79_cpu_clk.rate = ath79_ref_clk.rate;
++	else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL)
++		ath79_cpu_clk.rate = cpu_pll / (postdiv + 1);
++	else
++		ath79_cpu_clk.rate = ddr_pll / (postdiv + 1);
++
++	postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) &
++		  QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_MASK;
++
++	if (clk_ctrl & QCA953X_PLL_CLK_CTRL_DDR_PLL_BYPASS)
++		ath79_ddr_clk.rate = ath79_ref_clk.rate;
++	else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL)
++		ath79_ddr_clk.rate = ddr_pll / (postdiv + 1);
++	else
++		ath79_ddr_clk.rate = cpu_pll / (postdiv + 1);
++
++	postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) &
++		  QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_MASK;
++
++	if (clk_ctrl & QCA953X_PLL_CLK_CTRL_AHB_PLL_BYPASS)
++		ath79_ahb_clk.rate = ath79_ref_clk.rate;
++	else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL)
++		ath79_ahb_clk.rate = ddr_pll / (postdiv + 1);
++	else
++		ath79_ahb_clk.rate = cpu_pll / (postdiv + 1);
++
++	ath79_wdt_clk.rate = ath79_ref_clk.rate;
++	ath79_uart_clk.rate = ath79_ref_clk.rate;
++}
++
+ static void __init qca955x_clocks_init(void)
+ {
+ 	u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv;
+@@ -383,6 +459,8 @@ void __init ath79_clocks_init(void)
+ 		ar933x_clocks_init();
+ 	else if (soc_is_ar934x())
+ 		ar934x_clocks_init();
++	else if (soc_is_qca953x())
++		qca953x_clocks_init();
+ 	else if (soc_is_qca955x())
+ 		qca955x_clocks_init();
+ 	else
+--- a/arch/mips/ath79/common.c
++++ b/arch/mips/ath79/common.c
+@@ -73,6 +73,8 @@ void ath79_device_reset_set(u32 mask)
+ 		reg = AR933X_RESET_REG_RESET_MODULE;
+ 	else if (soc_is_ar934x())
+ 		reg = AR934X_RESET_REG_RESET_MODULE;
++	else if (soc_is_qca953x())
++		reg = QCA953X_RESET_REG_RESET_MODULE;
+ 	else if (soc_is_qca955x())
+ 		reg = QCA955X_RESET_REG_RESET_MODULE;
+ 	else
+@@ -101,6 +103,8 @@ void ath79_device_reset_clear(u32 mask)
+ 		reg = AR933X_RESET_REG_RESET_MODULE;
+ 	else if (soc_is_ar934x())
+ 		reg = AR934X_RESET_REG_RESET_MODULE;
++	else if (soc_is_qca953x())
++		reg = QCA953X_RESET_REG_RESET_MODULE;
+ 	else if (soc_is_qca955x())
+ 		reg = QCA955X_RESET_REG_RESET_MODULE;
+ 	else
+--- a/arch/mips/ath79/dev-common.c
++++ b/arch/mips/ath79/dev-common.c
+@@ -100,6 +100,7 @@ void __init ath79_register_uart(void)
+ 	    soc_is_ar724x() ||
+ 	    soc_is_ar913x() ||
+ 	    soc_is_ar934x() ||
++	    soc_is_qca953x() ||
+ 	    soc_is_qca955x()) {
+ 		ath79_uart_data[0].uartclk = clk_get_rate(clk);
+ 		platform_device_register(&ath79_uart_device);
+--- a/arch/mips/ath79/dev-wmac.c
++++ b/arch/mips/ath79/dev-wmac.c
+@@ -149,6 +149,24 @@ static void ar934x_wmac_setup(void)
+ 		ath79_wmac_data.is_clk_25mhz = true;
+ }
+ 
++static void qca953x_wmac_setup(void)
++{
++	u32 t;
++
++	ath79_wmac_device.name = "qca953x_wmac";
++
++	ath79_wmac_resources[0].start = QCA953X_WMAC_BASE;
++	ath79_wmac_resources[0].end = QCA953X_WMAC_BASE + QCA953X_WMAC_SIZE - 1;
++	ath79_wmac_resources[1].start = ATH79_CPU_IRQ(2);
++	ath79_wmac_resources[1].end = ATH79_CPU_IRQ(2);
++
++	t = ath79_reset_rr(QCA953X_RESET_REG_BOOTSTRAP);
++	if (t & QCA953X_BOOTSTRAP_REF_CLK_40)
++		ath79_wmac_data.is_clk_25mhz = false;
++	else
++		ath79_wmac_data.is_clk_25mhz = true;
++}
++
+ static void qca955x_wmac_setup(void)
+ {
+ 	u32 t;
+@@ -366,6 +384,8 @@ void __init ath79_register_wmac(u8 *cal_
+ 		ar933x_wmac_setup();
+ 	else if (soc_is_ar934x())
+ 		ar934x_wmac_setup();
++	else if (soc_is_qca953x())
++		qca953x_wmac_setup();
+ 	else if (soc_is_qca955x())
+ 		qca955x_wmac_setup();
+ 	else
+--- a/arch/mips/ath79/early_printk.c
++++ b/arch/mips/ath79/early_printk.c
+@@ -114,6 +114,7 @@ static void prom_putchar_init(void)
+ 	case REV_ID_MAJOR_AR9341:
+ 	case REV_ID_MAJOR_AR9342:
+ 	case REV_ID_MAJOR_AR9344:
++	case REV_ID_MAJOR_QCA9533:
+ 	case REV_ID_MAJOR_QCA9556:
+ 	case REV_ID_MAJOR_QCA9558:
+ 		_prom_putchar = prom_putchar_ar71xx;
+--- a/arch/mips/ath79/gpio.c
++++ b/arch/mips/ath79/gpio.c
+@@ -224,6 +224,8 @@ void __init ath79_gpio_init(void)
+ 		ath79_gpio_count = AR933X_GPIO_COUNT;
+ 	else if (soc_is_ar934x())
+ 		ath79_gpio_count = AR934X_GPIO_COUNT;
++	else if (soc_is_qca953x())
++		ath79_gpio_count = QCA953X_GPIO_COUNT;
+ 	else if (soc_is_qca955x())
+ 		ath79_gpio_count = QCA955X_GPIO_COUNT;
+ 	else
+@@ -231,7 +233,7 @@ void __init ath79_gpio_init(void)
+ 
+ 	ath79_gpio_base = ioremap_nocache(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE);
+ 	ath79_gpio_chip.ngpio = ath79_gpio_count;
+-	if (soc_is_ar934x() || soc_is_qca955x()) {
++	if (soc_is_ar934x() || soc_is_qca953x() || soc_is_qca955x()) {
+ 		ath79_gpio_chip.direction_input = ar934x_gpio_direction_input;
+ 		ath79_gpio_chip.direction_output = ar934x_gpio_direction_output;
+ 	}
+--- a/arch/mips/ath79/irq.c
++++ b/arch/mips/ath79/irq.c
+@@ -106,6 +106,7 @@ static void __init ath79_misc_irq_init(v
+ 	else if (soc_is_ar724x() ||
+ 		 soc_is_ar933x() ||
+ 		 soc_is_ar934x() ||
++		 soc_is_qca953x() ||
+ 		 soc_is_qca955x())
+ 		ath79_misc_irq_chip.irq_ack = ar724x_misc_irq_ack;
+ 	else
+@@ -352,6 +353,9 @@ void __init arch_init_irq(void)
+ 	} else if (soc_is_ar934x()) {
+ 		ath79_ip2_handler = ath79_default_ip2_handler;
+ 		ath79_ip3_handler = ar934x_ip3_handler;
++	} else if (soc_is_qca953x()) {
++		ath79_ip2_handler = ath79_default_ip2_handler;
++		ath79_ip3_handler = ath79_default_ip3_handler;
+ 	} else if (soc_is_qca955x()) {
+ 		ath79_ip2_handler = ath79_default_ip2_handler;
+ 		ath79_ip3_handler = ath79_default_ip3_handler;
+--- a/arch/mips/ath79/setup.c
++++ b/arch/mips/ath79/setup.c
+@@ -151,6 +151,12 @@ static void __init ath79_detect_sys_type
+ 		rev = id & AR934X_REV_ID_REVISION_MASK;
+ 		break;
+ 
++	case REV_ID_MAJOR_QCA9533:
++		ath79_soc = ATH79_SOC_QCA9533;
++		chip = "9533";
++		rev = id & QCA953X_REV_ID_REVISION_MASK;
++		break;
++
+ 	case REV_ID_MAJOR_QCA9556:
+ 		ath79_soc = ATH79_SOC_QCA9556;
+ 		chip = "9556";
+@@ -169,7 +175,7 @@ static void __init ath79_detect_sys_type
+ 
+ 	ath79_soc_rev = rev;
+ 
+-	if (soc_is_qca955x())
++	if (soc_is_qca953x() || soc_is_qca955x())
+ 		sprintf(ath79_sys_type, "Qualcomm Atheros QCA%s rev %u",
+ 			chip, rev);
+ 	else
+--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
++++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+@@ -106,6 +106,9 @@
+ #define AR934X_SRIF_BASE	(AR71XX_APB_BASE + 0x00116000)
+ #define AR934X_SRIF_SIZE	0x1000
+ 
++#define QCA953X_WMAC_BASE	(AR71XX_APB_BASE + 0x00100000)
++#define QCA953X_WMAC_SIZE	0x20000
++
+ #define QCA955X_PCI_MEM_BASE0	0x10000000
+ #define QCA955X_PCI_MEM_BASE1	0x12000000
+ #define QCA955X_PCI_MEM_SIZE	0x02000000
+@@ -280,6 +283,43 @@
+ 
+ #define AR934X_PLL_SWITCH_CLOCK_CONTROL_MDIO_CLK_SEL	BIT(6)
+ 
++#define QCA953X_PLL_CPU_CONFIG_REG		0x00
++#define QCA953X_PLL_DDR_CONFIG_REG		0x04
++#define QCA953X_PLL_CLK_CTRL_REG		0x08
++#define QCA953X_PLL_ETH_XMII_CONTROL_REG	0x2c
++#define QCA953X_PLL_ETH_SGMII_CONTROL_REG	0x48
++
++#define QCA953X_PLL_CPU_CONFIG_NFRAC_SHIFT	0
++#define QCA953X_PLL_CPU_CONFIG_NFRAC_MASK	0x3f
++#define QCA953X_PLL_CPU_CONFIG_NINT_SHIFT	6
++#define QCA953X_PLL_CPU_CONFIG_NINT_MASK	0x3f
++#define QCA953X_PLL_CPU_CONFIG_REFDIV_SHIFT	12
++#define QCA953X_PLL_CPU_CONFIG_REFDIV_MASK	0x1f
++#define QCA953X_PLL_CPU_CONFIG_OUTDIV_SHIFT	19
++#define QCA953X_PLL_CPU_CONFIG_OUTDIV_MASK	0x3
++
++#define QCA953X_PLL_DDR_CONFIG_NFRAC_SHIFT	0
++#define QCA953X_PLL_DDR_CONFIG_NFRAC_MASK	0x3ff
++#define QCA953X_PLL_DDR_CONFIG_NINT_SHIFT	10
++#define QCA953X_PLL_DDR_CONFIG_NINT_MASK	0x3f
++#define QCA953X_PLL_DDR_CONFIG_REFDIV_SHIFT	16
++#define QCA953X_PLL_DDR_CONFIG_REFDIV_MASK	0x1f
++#define QCA953X_PLL_DDR_CONFIG_OUTDIV_SHIFT	23
++#define QCA953X_PLL_DDR_CONFIG_OUTDIV_MASK	0x7
++
++#define QCA953X_PLL_CLK_CTRL_CPU_PLL_BYPASS		BIT(2)
++#define QCA953X_PLL_CLK_CTRL_DDR_PLL_BYPASS		BIT(3)
++#define QCA953X_PLL_CLK_CTRL_AHB_PLL_BYPASS		BIT(4)
++#define QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT		5
++#define QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_MASK		0x1f
++#define QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT		10
++#define QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_MASK		0x1f
++#define QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT		15
++#define QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_MASK		0x1f
++#define QCA953X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL		BIT(20)
++#define QCA953X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL		BIT(21)
++#define QCA953X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL		BIT(24)
++
+ #define QCA955X_PLL_CPU_CONFIG_REG		0x00
+ #define QCA955X_PLL_DDR_CONFIG_REG		0x04
+ #define QCA955X_PLL_CLK_CTRL_REG		0x08
+@@ -356,6 +396,10 @@
+ #define AR934X_RESET_REG_BOOTSTRAP		0xb0
+ #define AR934X_RESET_REG_PCIE_WMAC_INT_STATUS	0xac
+ 
++#define QCA953X_RESET_REG_RESET_MODULE		0x1c
++#define QCA953X_RESET_REG_BOOTSTRAP		0xb0
++#define QCA953X_RESET_REG_EXT_INT_STATUS	0xac
++
+ #define QCA955X_RESET_REG_RESET_MODULE		0x1c
+ #define QCA955X_RESET_REG_BOOTSTRAP		0xb0
+ #define QCA955X_RESET_REG_EXT_INT_STATUS	0xac
+@@ -504,6 +548,8 @@
+ #define AR934X_BOOTSTRAP_SDRAM_DISABLED BIT(1)
+ #define AR934X_BOOTSTRAP_DDR1		BIT(0)
+ 
++#define QCA953X_BOOTSTRAP_REF_CLK_40	BIT(4)
++
+ #define QCA955X_BOOTSTRAP_REF_CLK_40	BIT(4)
+ 
+ #define AR934X_PCIE_WMAC_INT_WMAC_MISC		BIT(0)
+@@ -566,6 +612,7 @@
+ #define REV_ID_MAJOR_AR9341		0x0120
+ #define REV_ID_MAJOR_AR9342		0x1120
+ #define REV_ID_MAJOR_AR9344		0x2120
++#define REV_ID_MAJOR_QCA9533		0x0140
+ #define REV_ID_MAJOR_QCA9556		0x0130
+ #define REV_ID_MAJOR_QCA9558		0x1130
+ 
+@@ -588,6 +635,8 @@
+ 
+ #define AR934X_REV_ID_REVISION_MASK	0xf
+ 
++#define QCA953X_REV_ID_REVISION_MASK	0xf
++
+ #define QCA955X_REV_ID_REVISION_MASK	0xf
+ 
+ /*
+@@ -641,6 +690,7 @@
+ #define AR913X_GPIO_COUNT		22
+ #define AR933X_GPIO_COUNT		30
+ #define AR934X_GPIO_COUNT		23
++#define QCA953X_GPIO_COUNT		24
+ #define QCA955X_GPIO_COUNT		24
+ 
+ /*
+--- a/arch/mips/include/asm/mach-ath79/ath79.h
++++ b/arch/mips/include/asm/mach-ath79/ath79.h
+@@ -32,6 +32,7 @@ enum ath79_soc_type {
+ 	ATH79_SOC_AR9341,
+ 	ATH79_SOC_AR9342,
+ 	ATH79_SOC_AR9344,
++	ATH79_SOC_QCA9533,
+ 	ATH79_SOC_QCA9556,
+ 	ATH79_SOC_QCA9558,
+ };
+@@ -100,6 +101,16 @@ static inline int soc_is_ar934x(void)
+ 	return soc_is_ar9341() || soc_is_ar9342() || soc_is_ar9344();
+ }
+ 
++static inline int soc_is_qca9533(void)
++{
++	return ath79_soc == ATH79_SOC_QCA9533;
++}
++
++static inline int soc_is_qca953x(void)
++{
++	return soc_is_qca9533();
++}
++
+ static inline int soc_is_qca9556(void)
+ {
+ 	return ath79_soc == ATH79_SOC_QCA9556;