original development tree for Linux kernel GTP module; now long in mainline.
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linux-gtp/arch/arm/mach-spear6xx/spear6xx.c

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9.7 KiB

/*
* arch/arm/mach-spear6xx/spear6xx.c
*
* SPEAr6XX machines common source file
*
* Copyright (C) 2009 ST Microelectronics
* Rajeev Kumar<rajeev-dlh.kumar@st.com>
*
* Copyright 2012 Stefan Roese <sr@denx.de>
*
* 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/amba/pl08x.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <asm/hardware/pl080.h>
#include <asm/hardware/vic.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <asm/mach/map.h>
#include <plat/pl080.h>
#include <mach/generic.h>
#include <mach/spear.h>
/* dmac device registration */
static struct pl08x_channel_data spear600_dma_info[] = {
{
.bus_id = "ssp1_rx",
.min_signal = 0,
.max_signal = 0,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp1_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart0_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart0_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart1_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "uart1_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp2_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp2_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ssp0_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ssp0_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "i2c_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "irda",
.min_signal = 12,
.max_signal = 12,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "adc",
.min_signal = 13,
.max_signal = 13,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "to_jpeg",
.min_signal = 14,
.max_signal = 14,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "from_jpeg",
.min_signal = 15,
.max_signal = 15,
.muxval = 0,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras0_rx",
.min_signal = 0,
.max_signal = 0,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras0_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras1_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras1_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras2_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras2_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras3_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras3_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras4_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras4_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras5_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras5_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras6_rx",
.min_signal = 12,
.max_signal = 12,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras6_tx",
.min_signal = 13,
.max_signal = 13,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras7_rx",
.min_signal = 14,
.max_signal = 14,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ras7_tx",
.min_signal = 15,
.max_signal = 15,
.muxval = 1,
.cctl = 0,
.periph_buses = PL08X_AHB1,
}, {
.bus_id = "ext0_rx",
.min_signal = 0,
.max_signal = 0,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext0_tx",
.min_signal = 1,
.max_signal = 1,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext1_rx",
.min_signal = 2,
.max_signal = 2,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext1_tx",
.min_signal = 3,
.max_signal = 3,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext2_rx",
.min_signal = 4,
.max_signal = 4,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext2_tx",
.min_signal = 5,
.max_signal = 5,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext3_rx",
.min_signal = 6,
.max_signal = 6,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext3_tx",
.min_signal = 7,
.max_signal = 7,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext4_rx",
.min_signal = 8,
.max_signal = 8,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext4_tx",
.min_signal = 9,
.max_signal = 9,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext5_rx",
.min_signal = 10,
.max_signal = 10,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext5_tx",
.min_signal = 11,
.max_signal = 11,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext6_rx",
.min_signal = 12,
.max_signal = 12,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext6_tx",
.min_signal = 13,
.max_signal = 13,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext7_rx",
.min_signal = 14,
.max_signal = 14,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
}, {
.bus_id = "ext7_tx",
.min_signal = 15,
.max_signal = 15,
.muxval = 2,
.cctl = 0,
.periph_buses = PL08X_AHB2,
},
};
struct pl08x_platform_data pl080_plat_data = {
.memcpy_channel = {
.bus_id = "memcpy",
.cctl = (PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \
PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT | \
PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE | \
PL080_CONTROL_PROT_SYS),
},
.lli_buses = PL08X_AHB1,
.mem_buses = PL08X_AHB1,
.get_signal = pl080_get_signal,
.put_signal = pl080_put_signal,
.slave_channels = spear600_dma_info,
.num_slave_channels = ARRAY_SIZE(spear600_dma_info),
};
/*
* Following will create 16MB static virtual/physical mappings
* PHYSICAL VIRTUAL
* 0xF0000000 0xF0000000
* 0xF1000000 0xF1000000
* 0xD0000000 0xFD000000
* 0xFC000000 0xFC000000
*/
struct map_desc spear6xx_io_desc[] __initdata = {
{
.virtual = VA_SPEAR6XX_ML_CPU_BASE,
.pfn = __phys_to_pfn(SPEAR6XX_ML_CPU_BASE),
.length = 2 * SZ_16M,
.type = MT_DEVICE
}, {
.virtual = VA_SPEAR6XX_ICM1_BASE,
.pfn = __phys_to_pfn(SPEAR6XX_ICM1_BASE),
.length = SZ_16M,
.type = MT_DEVICE
}, {
.virtual = VA_SPEAR6XX_ICM3_SMI_CTRL_BASE,
.pfn = __phys_to_pfn(SPEAR6XX_ICM3_SMI_CTRL_BASE),
.length = SZ_16M,
.type = MT_DEVICE
},
};
/* This will create static memory mapping for selected devices */
void __init spear6xx_map_io(void)
{
iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc));
}
static void __init spear6xx_timer_init(void)
{
char pclk_name[] = "pll3_48m_clk";
struct clk *gpt_clk, *pclk;
spear6xx_clk_init();
/* get the system timer clock */
gpt_clk = clk_get_sys("gpt0", NULL);
if (IS_ERR(gpt_clk)) {
pr_err("%s:couldn't get clk for gpt\n", __func__);
BUG();
}
/* get the suitable parent clock for timer*/
pclk = clk_get(NULL, pclk_name);
if (IS_ERR(pclk)) {
pr_err("%s:couldn't get %s as parent for gpt\n",
__func__, pclk_name);
BUG();
}
clk_set_parent(gpt_clk, pclk);
clk_put(gpt_clk);
clk_put(pclk);
spear_setup_of_timer();
}
struct sys_timer spear6xx_timer = {
.init = spear6xx_timer_init,
};
/* Add auxdata to pass platform data */
struct of_dev_auxdata spear6xx_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("arm,pl080", SPEAR6XX_ICM3_DMA_BASE, NULL,
&pl080_plat_data),
{}
};
static void __init spear600_dt_init(void)
{
of_platform_populate(NULL, of_default_bus_match_table,
spear6xx_auxdata_lookup, NULL);
}
static const char *spear600_dt_board_compat[] = {
"st,spear600",
NULL
};
static const struct of_device_id vic_of_match[] __initconst = {
{ .compatible = "arm,pl190-vic", .data = vic_of_init, },
{ /* Sentinel */ }
};
static void __init spear6xx_dt_init_irq(void)
{
of_irq_init(vic_of_match);
}
DT_MACHINE_START(SPEAR600_DT, "ST SPEAr600 (Flattened Device Tree)")
.map_io = spear6xx_map_io,
.init_irq = spear6xx_dt_init_irq,
.handle_irq = vic_handle_irq,
.timer = &spear6xx_timer,
.init_machine = spear600_dt_init,
.restart = spear_restart,
.dt_compat = spear600_dt_board_compat,
MACHINE_END