davinci: DM646x: add base SoC and board support

Add support for DM646x SoC (a.k.a DaVinci HD) and its Evalution
Module (EVM.)

Original support done by Sudhakar Rajashekhara.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 402 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
new file mode 100644
index 0000000..93443a6
--- /dev/null
+++ b/arch/arm/mach-davinci/dm646x.c
@@ -0,0 +1,402 @@
+/*
+ * TI DaVinci DM644x chip specific setup
+ *
+ * Author: Kevin Hilman, Deep Root Systems, LLC
+ *
+ * 2007 (c) Deep Root Systems, LLC. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+
+#include <mach/dm646x.h>
+#include <mach/clock.h>
+#include <mach/cputype.h>
+#include <mach/edma.h>
+#include <mach/irqs.h>
+#include <mach/psc.h>
+#include <mach/mux.h>
+
+#include "clock.h"
+#include "mux.h"
+
+/*
+ * Device specific clocks
+ */
+#define DM646X_REF_FREQ		27000000
+#define DM646X_AUX_FREQ		24000000
+
+static struct pll_data pll1_data = {
+	.num       = 1,
+	.phys_base = DAVINCI_PLL1_BASE,
+};
+
+static struct pll_data pll2_data = {
+	.num       = 2,
+	.phys_base = DAVINCI_PLL2_BASE,
+};
+
+static struct clk ref_clk = {
+	.name = "ref_clk",
+	.rate = DM646X_REF_FREQ,
+};
+
+static struct clk aux_clkin = {
+	.name = "aux_clkin",
+	.rate = DM646X_AUX_FREQ,
+};
+
+static struct clk pll1_clk = {
+	.name = "pll1",
+	.parent = &ref_clk,
+	.pll_data = &pll1_data,
+	.flags = CLK_PLL,
+};
+
+static struct clk pll1_sysclk1 = {
+	.name = "pll1_sysclk1",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL,
+	.div_reg = PLLDIV1,
+};
+
+static struct clk pll1_sysclk2 = {
+	.name = "pll1_sysclk2",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL,
+	.div_reg = PLLDIV2,
+};
+
+static struct clk pll1_sysclk3 = {
+	.name = "pll1_sysclk3",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL,
+	.div_reg = PLLDIV3,
+};
+
+static struct clk pll1_sysclk4 = {
+	.name = "pll1_sysclk4",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL,
+	.div_reg = PLLDIV4,
+};
+
+static struct clk pll1_sysclk5 = {
+	.name = "pll1_sysclk5",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL,
+	.div_reg = PLLDIV5,
+};
+
+static struct clk pll1_sysclk6 = {
+	.name = "pll1_sysclk6",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL,
+	.div_reg = PLLDIV6,
+};
+
+static struct clk pll1_sysclk8 = {
+	.name = "pll1_sysclk8",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL,
+	.div_reg = PLLDIV8,
+};
+
+static struct clk pll1_sysclk9 = {
+	.name = "pll1_sysclk9",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL,
+	.div_reg = PLLDIV9,
+};
+
+static struct clk pll1_sysclkbp = {
+	.name = "pll1_sysclkbp",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL | PRE_PLL,
+	.div_reg = BPDIV,
+};
+
+static struct clk pll1_aux_clk = {
+	.name = "pll1_aux_clk",
+	.parent = &pll1_clk,
+	.flags = CLK_PLL | PRE_PLL,
+};
+
+static struct clk pll2_clk = {
+	.name = "pll2_clk",
+	.parent = &ref_clk,
+	.pll_data = &pll2_data,
+	.flags = CLK_PLL,
+};
+
+static struct clk pll2_sysclk1 = {
+	.name = "pll2_sysclk1",
+	.parent = &pll2_clk,
+	.flags = CLK_PLL,
+	.div_reg = PLLDIV1,
+};
+
+static struct clk dsp_clk = {
+	.name = "dsp",
+	.parent = &pll1_sysclk1,
+	.lpsc = DM646X_LPSC_C64X_CPU,
+	.flags = PSC_DSP,
+	.usecount = 1,			/* REVISIT how to disable? */
+};
+
+static struct clk arm_clk = {
+	.name = "arm",
+	.parent = &pll1_sysclk2,
+	.lpsc = DM646X_LPSC_ARM,
+	.flags = ALWAYS_ENABLED,
+};
+
+static struct clk uart0_clk = {
+	.name = "uart0",
+	.parent = &aux_clkin,
+	.lpsc = DM646X_LPSC_UART0,
+};
+
+static struct clk uart1_clk = {
+	.name = "uart1",
+	.parent = &aux_clkin,
+	.lpsc = DM646X_LPSC_UART1,
+};
+
+static struct clk uart2_clk = {
+	.name = "uart2",
+	.parent = &aux_clkin,
+	.lpsc = DM646X_LPSC_UART2,
+};
+
+static struct clk i2c_clk = {
+	.name = "I2CCLK",
+	.parent = &pll1_sysclk3,
+	.lpsc = DM646X_LPSC_I2C,
+};
+
+static struct clk gpio_clk = {
+	.name = "gpio",
+	.parent = &pll1_sysclk3,
+	.lpsc = DM646X_LPSC_GPIO,
+};
+
+static struct clk aemif_clk = {
+	.name = "aemif",
+	.parent = &pll1_sysclk3,
+	.lpsc = DM646X_LPSC_AEMIF,
+	.flags = ALWAYS_ENABLED,
+};
+
+static struct clk emac_clk = {
+	.name = "emac",
+	.parent = &pll1_sysclk3,
+	.lpsc = DM646X_LPSC_EMAC,
+};
+
+static struct clk pwm0_clk = {
+	.name = "pwm0",
+	.parent = &pll1_sysclk3,
+	.lpsc = DM646X_LPSC_PWM0,
+	.usecount = 1,            /* REVIST: disabling hangs system */
+};
+
+static struct clk pwm1_clk = {
+	.name = "pwm1",
+	.parent = &pll1_sysclk3,
+	.lpsc = DM646X_LPSC_PWM1,
+	.usecount = 1,            /* REVIST: disabling hangs system */
+};
+
+static struct clk timer0_clk = {
+	.name = "timer0",
+	.parent = &pll1_sysclk3,
+	.lpsc = DM646X_LPSC_TIMER0,
+};
+
+static struct clk timer1_clk = {
+	.name = "timer1",
+	.parent = &pll1_sysclk3,
+	.lpsc = DM646X_LPSC_TIMER1,
+};
+
+static struct clk timer2_clk = {
+	.name = "timer2",
+	.parent = &pll1_sysclk3,
+	.flags = ALWAYS_ENABLED, /* no LPSC, always enabled; c.f. spruep9a */
+};
+
+static struct clk vpif0_clk = {
+	.name = "vpif0",
+	.parent = &ref_clk,
+	.lpsc = DM646X_LPSC_VPSSMSTR,
+	.flags = ALWAYS_ENABLED,
+};
+
+static struct clk vpif1_clk = {
+	.name = "vpif1",
+	.parent = &ref_clk,
+	.lpsc = DM646X_LPSC_VPSSSLV,
+	.flags = ALWAYS_ENABLED,
+};
+
+struct davinci_clk dm646x_clks[] = {
+	CLK(NULL, "ref", &ref_clk),
+	CLK(NULL, "aux", &aux_clkin),
+	CLK(NULL, "pll1", &pll1_clk),
+	CLK(NULL, "pll1_sysclk", &pll1_sysclk1),
+	CLK(NULL, "pll1_sysclk", &pll1_sysclk2),
+	CLK(NULL, "pll1_sysclk", &pll1_sysclk3),
+	CLK(NULL, "pll1_sysclk", &pll1_sysclk4),
+	CLK(NULL, "pll1_sysclk", &pll1_sysclk5),
+	CLK(NULL, "pll1_sysclk", &pll1_sysclk6),
+	CLK(NULL, "pll1_sysclk", &pll1_sysclk8),
+	CLK(NULL, "pll1_sysclk", &pll1_sysclk9),
+	CLK(NULL, "pll1_sysclk", &pll1_sysclkbp),
+	CLK(NULL, "pll1_aux", &pll1_aux_clk),
+	CLK(NULL, "pll2", &pll2_clk),
+	CLK(NULL, "pll2_sysclk1", &pll2_sysclk1),
+	CLK(NULL, "dsp", &dsp_clk),
+	CLK(NULL, "arm", &arm_clk),
+	CLK(NULL, "uart0", &uart0_clk),
+	CLK(NULL, "uart1", &uart1_clk),
+	CLK(NULL, "uart2", &uart2_clk),
+	CLK("i2c_davinci.1", NULL, &i2c_clk),
+	CLK(NULL, "gpio", &gpio_clk),
+	CLK(NULL, "aemif", &aemif_clk),
+	CLK("davinci_emac.1", NULL, &emac_clk),
+	CLK(NULL, "pwm0", &pwm0_clk),
+	CLK(NULL, "pwm1", &pwm1_clk),
+	CLK(NULL, "timer0", &timer0_clk),
+	CLK(NULL, "timer1", &timer1_clk),
+	CLK("watchdog", NULL, &timer2_clk),
+	CLK(NULL, "vpif0", &vpif0_clk),
+	CLK(NULL, "vpif1", &vpif1_clk),
+	CLK(NULL, NULL, NULL),
+};
+
+/*
+ * Device specific mux setup
+ *
+ *	soc	description	mux  mode   mode  mux	 dbg
+ *				reg  offset mask  mode
+ */
+static const struct mux_config dm646x_pins[] = {
+MUX_CFG(DM646X, ATAEN,		0,   0,     1,	  1,	 true)
+
+MUX_CFG(DM646X, AUDCK1,		0,   29,    1,	  0,	 false)
+
+MUX_CFG(DM646X, AUDCK0,		0,   28,    1,	  0,	 false)
+
+MUX_CFG(DM646X, CRGMUX,			0,   24,    7,    5,	 true)
+
+MUX_CFG(DM646X, STSOMUX_DISABLE,	0,   22,    3,    0,	 true)
+
+MUX_CFG(DM646X, STSIMUX_DISABLE,	0,   20,    3,    0,	 true)
+
+MUX_CFG(DM646X, PTSOMUX_DISABLE,	0,   18,    3,    0,	 true)
+
+MUX_CFG(DM646X, PTSIMUX_DISABLE,	0,   16,    3,    0,	 true)
+
+MUX_CFG(DM646X, STSOMUX,		0,   22,    3,    2,	 true)
+
+MUX_CFG(DM646X, STSIMUX,		0,   20,    3,    2,	 true)
+
+MUX_CFG(DM646X, PTSOMUX_PARALLEL,	0,   18,    3,    2,	 true)
+
+MUX_CFG(DM646X, PTSIMUX_PARALLEL,	0,   16,    3,    2,	 true)
+
+MUX_CFG(DM646X, PTSOMUX_SERIAL,		0,   18,    3,    3,	 true)
+
+MUX_CFG(DM646X, PTSIMUX_SERIAL,		0,   16,    3,    3,	 true)
+};
+
+/*----------------------------------------------------------------------*/
+
+static const s8 dma_chan_dm646x_no_event[] = {
+	 0,  1,  2,  3, 13,
+	14, 15, 24, 25, 26,
+	27, 30, 31, 54, 55,
+	56,
+	-1
+};
+
+static struct edma_soc_info dm646x_edma_info = {
+	.n_channel	= 64,
+	.n_region	= 6,	/* 0-1, 4-7 */
+	.n_slot		= 512,
+	.n_tc		= 4,
+	.noevent	= dma_chan_dm646x_no_event,
+};
+
+static struct resource edma_resources[] = {
+	{
+		.name	= "edma_cc",
+		.start	= 0x01c00000,
+		.end	= 0x01c00000 + SZ_64K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.name	= "edma_tc0",
+		.start	= 0x01c10000,
+		.end	= 0x01c10000 + SZ_1K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.name	= "edma_tc1",
+		.start	= 0x01c10400,
+		.end	= 0x01c10400 + SZ_1K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.name	= "edma_tc2",
+		.start	= 0x01c10800,
+		.end	= 0x01c10800 + SZ_1K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.name	= "edma_tc3",
+		.start	= 0x01c10c00,
+		.end	= 0x01c10c00 + SZ_1K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.start	= IRQ_CCINT0,
+		.flags	= IORESOURCE_IRQ,
+	},
+	{
+		.start	= IRQ_CCERRINT,
+		.flags	= IORESOURCE_IRQ,
+	},
+	/* not using TC*_ERR */
+};
+
+static struct platform_device dm646x_edma_device = {
+	.name			= "edma",
+	.id			= -1,
+	.dev.platform_data	= &dm646x_edma_info,
+	.num_resources		= ARRAY_SIZE(edma_resources),
+	.resource		= edma_resources,
+};
+
+/*----------------------------------------------------------------------*/
+
+void __init dm646x_init(void)
+{
+	davinci_clk_init(dm646x_clks);
+	davinci_mux_register(dm646x_pins, ARRAY_SIZE(dm646x_pins));
+}
+
+static int __init dm646x_init_devices(void)
+{
+	if (!cpu_is_davinci_dm646x())
+		return 0;
+
+	platform_device_register(&dm646x_edma_device);
+	return 0;
+}
+postcore_initcall(dm646x_init_devices);