ar71xx: add initial support for the QCA955X SoCs

SVN-Revision: 32606

1 files changed, 167 insertions, 0 deletions

diff --git a/target/linux/ar71xx/patches-3.3/162-MIPS-ath79-add-clock-setup-for-the-QCA955X-SoCs.patch b/target/linux/ar71xx/patches-3.3/162-MIPS-ath79-add-clock-setup-for-the-QCA955X-SoCs.patch
new file mode 100644
index 0000000000..ff8be83888
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.3/162-MIPS-ath79-add-clock-setup-for-the-QCA955X-SoCs.patch
@@ -0,0 +1,167 @@
+From f465a16766a015a31d4e83af1ad62cc718d64f5a Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <juhosg@openwrt.org>
+Date: Sun, 24 Jun 2012 13:43:08 +0200
+Subject: [PATCH 18/34] MIPS: ath79: add clock setup for the QCA955X SoCs
+
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+---
+ arch/mips/ath79/clock.c                        |   78 ++++++++++++++++++++++++
+ arch/mips/include/asm/mach-ath79/ar71xx_regs.h |   39 ++++++++++++
+ 2 files changed, 117 insertions(+), 0 deletions(-)
+
+--- a/arch/mips/ath79/clock.c
++++ b/arch/mips/ath79/clock.c
+@@ -242,6 +242,82 @@ static void __init ar934x_clocks_init(vo
+ 	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;
++	u32 cpu_pll, ddr_pll;
++	u32 bootstrap;
++
++	bootstrap = ath79_reset_rr(QCA955X_RESET_REG_BOOTSTRAP);
++	if (bootstrap &	QCA955X_BOOTSTRAP_REF_CLK_40)
++		ath79_ref_clk.rate = 40 * 1000 * 1000;
++	else
++		ath79_ref_clk.rate = 25 * 1000 * 1000;
++
++	pll = ath79_pll_rr(QCA955X_PLL_CPU_CONFIG_REG);
++	out_div = (pll >> QCA955X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
++		  QCA955X_PLL_CPU_CONFIG_OUTDIV_MASK;
++	ref_div = (pll >> QCA955X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
++		  QCA955X_PLL_CPU_CONFIG_REFDIV_MASK;
++	nint = (pll >> QCA955X_PLL_CPU_CONFIG_NINT_SHIFT) &
++	       QCA955X_PLL_CPU_CONFIG_NINT_MASK;
++	frac = (pll >> QCA955X_PLL_CPU_CONFIG_NFRAC_SHIFT) &
++	       QCA955X_PLL_CPU_CONFIG_NFRAC_MASK;
++
++	cpu_pll = nint * ath79_ref_clk.rate / ref_div;
++	cpu_pll += frac * ath79_ref_clk.rate / (ref_div * (2 << 6));
++	cpu_pll /= (1 << out_div);
++
++	pll = ath79_pll_rr(QCA955X_PLL_DDR_CONFIG_REG);
++	out_div = (pll >> QCA955X_PLL_DDR_CONFIG_OUTDIV_SHIFT) &
++		  QCA955X_PLL_DDR_CONFIG_OUTDIV_MASK;
++	ref_div = (pll >> QCA955X_PLL_DDR_CONFIG_REFDIV_SHIFT) &
++		  QCA955X_PLL_DDR_CONFIG_REFDIV_MASK;
++	nint = (pll >> QCA955X_PLL_DDR_CONFIG_NINT_SHIFT) &
++	       QCA955X_PLL_DDR_CONFIG_NINT_MASK;
++	frac = (pll >> QCA955X_PLL_DDR_CONFIG_NFRAC_SHIFT) &
++	       QCA955X_PLL_DDR_CONFIG_NFRAC_MASK;
++
++	ddr_pll = nint * ath79_ref_clk.rate / ref_div;
++	ddr_pll += frac * ath79_ref_clk.rate / (ref_div * (2 << 10));
++	ddr_pll /= (1 << out_div);
++
++	clk_ctrl = ath79_pll_rr(QCA955X_PLL_CLK_CTRL_REG);
++
++	postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) &
++		  QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_MASK;
++
++	if (clk_ctrl & QCA955X_PLL_CLK_CTRL_CPU_PLL_BYPASS)
++		ath79_cpu_clk.rate = ath79_ref_clk.rate;
++	else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL)
++		ath79_cpu_clk.rate = ddr_pll / (postdiv + 1);
++	else
++		ath79_cpu_clk.rate = cpu_pll / (postdiv + 1);
++
++	postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) &
++		  QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_MASK;
++
++	if (clk_ctrl & QCA955X_PLL_CLK_CTRL_DDR_PLL_BYPASS)
++		ath79_ddr_clk.rate = ath79_ref_clk.rate;
++	else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL)
++		ath79_ddr_clk.rate = cpu_pll / (postdiv + 1);
++	else
++		ath79_ddr_clk.rate = ddr_pll / (postdiv + 1);
++
++	postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) &
++		  QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_MASK;
++
++	if (clk_ctrl & QCA955X_PLL_CLK_CTRL_AHB_PLL_BYPASS)
++		ath79_ahb_clk.rate = ath79_ref_clk.rate;
++	else if (clk_ctrl & QCA955X_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;
++}
++
+ void __init ath79_clocks_init(void)
+ {
+ 	if (soc_is_ar71xx())
+@@ -254,6 +330,8 @@ void __init ath79_clocks_init(void)
+ 		ar933x_clocks_init();
+ 	else if (soc_is_ar934x())
+ 		ar934x_clocks_init();
++	else if (soc_is_qca955x())
++		qca955x_clocks_init();
+ 	else
+ 		BUG();
+ 
+--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
++++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+@@ -223,6 +223,41 @@
+ #define AR934X_PLL_CPU_DDR_CLK_CTRL_DDRCLK_FROM_DDRPLL	BIT(21)
+ #define AR934X_PLL_CPU_DDR_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
++
++#define QCA955X_PLL_CPU_CONFIG_NFRAC_SHIFT	0
++#define QCA955X_PLL_CPU_CONFIG_NFRAC_MASK	0x3f
++#define QCA955X_PLL_CPU_CONFIG_NINT_SHIFT	6
++#define QCA955X_PLL_CPU_CONFIG_NINT_MASK	0x3f
++#define QCA955X_PLL_CPU_CONFIG_REFDIV_SHIFT	12
++#define QCA955X_PLL_CPU_CONFIG_REFDIV_MASK	0x1f
++#define QCA955X_PLL_CPU_CONFIG_OUTDIV_SHIFT	19
++#define QCA955X_PLL_CPU_CONFIG_OUTDIV_MASK	0x3
++
++#define QCA955X_PLL_DDR_CONFIG_NFRAC_SHIFT	0
++#define QCA955X_PLL_DDR_CONFIG_NFRAC_MASK	0x3ff
++#define QCA955X_PLL_DDR_CONFIG_NINT_SHIFT	10
++#define QCA955X_PLL_DDR_CONFIG_NINT_MASK	0x3f
++#define QCA955X_PLL_DDR_CONFIG_REFDIV_SHIFT	16
++#define QCA955X_PLL_DDR_CONFIG_REFDIV_MASK	0x1f
++#define QCA955X_PLL_DDR_CONFIG_OUTDIV_SHIFT	23
++#define QCA955X_PLL_DDR_CONFIG_OUTDIV_MASK	0x7
++
++#define QCA955X_PLL_CLK_CTRL_CPU_PLL_BYPASS		BIT(2)
++#define QCA955X_PLL_CLK_CTRL_DDR_PLL_BYPASS		BIT(3)
++#define QCA955X_PLL_CLK_CTRL_AHB_PLL_BYPASS		BIT(4)
++#define QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT		5
++#define QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_MASK		0x1f
++#define QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT		10
++#define QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_MASK		0x1f
++#define QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT		15
++#define QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_MASK		0x1f
++#define QCA955X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL		BIT(20)
++#define QCA955X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL		BIT(21)
++#define QCA955X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL		BIT(24)
++
+ /*
+  * USB_CONFIG block
+  */
+@@ -262,6 +297,8 @@
+ #define AR934X_RESET_REG_BOOTSTRAP		0xb0
+ #define AR934X_RESET_REG_PCIE_WMAC_INT_STATUS	0xac
+ 
++#define QCA955X_RESET_REG_BOOTSTRAP		0xb0
++
+ #define MISC_INT_ETHSW			BIT(12)
+ #define MISC_INT_TIMER4			BIT(10)
+ #define MISC_INT_TIMER3			BIT(9)
+@@ -339,6 +376,8 @@
+ #define AR934X_BOOTSTRAP_SDRAM_DISABLED	BIT(1)
+ #define AR934X_BOOTSTRAP_DDR1		BIT(0)
+ 
++#define QCA955X_BOOTSTRAP_REF_CLK_40	BIT(4)
++
+ #define AR934X_PCIE_WMAC_INT_WMAC_MISC		BIT(0)
+ #define AR934X_PCIE_WMAC_INT_WMAC_TX		BIT(1)
+ #define AR934X_PCIE_WMAC_INT_WMAC_RXLP		BIT(2)