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
@@ -1228,6 +1228,10 @@ 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 HW_HAS_PCI
 	select PCI_AR724X if PCI
@@ -1270,7 +1274,7 @@ 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
@@ -350,6 +350,91 @@ static void __init ar934x_clocks_init(vo
 	iounmap(dpll_base);
 }
 
+static void __init qca953x_clocks_init(void)
+{
+	unsigned long ref_rate;
+	unsigned long cpu_rate;
+	unsigned long ddr_rate;
+	unsigned long ahb_rate;
+	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)
+		ref_rate = 40 * 1000 * 1000;
+	else
+		ref_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 * ref_rate / ref_div;
+	cpu_pll += frac * (ref_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 * ref_rate / ref_div;
+	ddr_pll += frac * (ref_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)
+		cpu_rate = ref_rate;
+	else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL)
+		cpu_rate = cpu_pll / (postdiv + 1);
+	else
+		cpu_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)
+		ddr_rate = ref_rate;
+	else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL)
+		ddr_rate = ddr_pll / (postdiv + 1);
+	else
+		ddr_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)
+		ahb_rate = ref_rate;
+	else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL)
+		ahb_rate = ddr_pll / (postdiv + 1);
+	else
+		ahb_rate = cpu_pll / (postdiv + 1);
+
+	ath79_add_sys_clkdev("ref", ref_rate);
+	ath79_add_sys_clkdev("cpu", cpu_rate);
+	ath79_add_sys_clkdev("ddr", ddr_rate);
+	ath79_add_sys_clkdev("ahb", ahb_rate);
+
+	clk_add_alias("wdt", NULL, "ref", NULL);
+	clk_add_alias("uart", NULL, "ref", NULL);
+}
+
 static void __init qca955x_clocks_init(void)
 {
 	unsigned long ref_rate;
@@ -447,6 +532,8 @@ 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
@@ -93,6 +93,7 @@ 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 = uart_clk_rate;
 		platform_device_register(&ath79_uart_device);
--- a/arch/mips/ath79/dev-wmac.c
+++ b/arch/mips/ath79/dev-wmac.c
@@ -101,7 +101,7 @@ static int ar933x_wmac_reset(void)
 	return -ETIMEDOUT;
 }
 
-static int ar933x_r1_get_wmac_revision(void)
+static int ar93xx_get_soc_revision(void)
 {
 	return ath79_soc_rev;
 }
@@ -126,7 +126,7 @@ static void __init ar933x_wmac_setup(voi
 		ath79_wmac_data.is_clk_25mhz = true;
 
 	if (ath79_soc_rev == 1)
-		ath79_wmac_data.get_mac_revision = ar933x_r1_get_wmac_revision;
+		ath79_wmac_data.get_mac_revision = ar93xx_get_soc_revision;
 
 	ath79_wmac_data.external_reset = ar933x_wmac_reset;
 }
@@ -149,6 +149,26 @@ 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;
+
+	ath79_wmac_data.get_mac_revision = ar93xx_get_soc_revision;
+}
+
 static void qca955x_wmac_setup(void)
 {
 	u32 t;
@@ -366,6 +386,8 @@ 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 +114,8 @@ 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_QCA9533_V2:
 	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
@@ -59,6 +59,7 @@ static void __init ath79_detect_sys_type
 	u32 major;
 	u32 minor;
 	u32 rev = 0;
+	u32 ver = 1;
 
 	id = ath79_reset_rr(AR71XX_RESET_REG_REV_ID);
 	major = id & REV_ID_MAJOR_MASK;
@@ -151,6 +152,16 @@ static void __init ath79_detect_sys_type
 		rev = id & AR934X_REV_ID_REVISION_MASK;
 		break;
 
+	case REV_ID_MAJOR_QCA9533_V2:
+		ver = 2;
+		/* drop through */
+
+	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";
@@ -169,9 +180,9 @@ static void __init ath79_detect_sys_type
 
 	ath79_soc_rev = rev;
 
-	if (soc_is_qca955x())
-		sprintf(ath79_sys_type, "Qualcomm Atheros QCA%s rev %u",
-			chip, rev);
+	if (soc_is_qca953x() || soc_is_qca955x())
+		sprintf(ath79_sys_type, "Qualcomm Atheros QCA%s ver %u rev %u",
+			chip, ver, rev);
 	else
 		sprintf(ath79_sys_type, "Atheros AR%s rev %u", chip, rev);
 	pr_info("SoC: %s\n", ath79_sys_type);
--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
@@ -105,6 +105,9 @@
 #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
@@ -279,6 +282,43 @@
 
 #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
@@ -355,6 +395,10 @@
 #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
@@ -503,6 +547,8 @@
 #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)
@@ -565,6 +611,8 @@
 #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_QCA9533_V2		0x0160
 #define REV_ID_MAJOR_QCA9556		0x0130
 #define REV_ID_MAJOR_QCA9558		0x1130
 
@@ -587,6 +635,8 @@
 
 #define AR934X_REV_ID_REVISION_MASK	0xf
 
+#define QCA953X_REV_ID_REVISION_MASK	0xf
+
 #define QCA955X_REV_ID_REVISION_MASK	0xf
 
 /*
@@ -640,6 +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;
