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10d8935f46
viresh.kumar@st.com email-id doesn't exist anymore as I have left the company. Replace ST's id with viresh.linux@gmail.com. It also updates .mailmap file to fix address for 'git shortlog' Signed-off-by: Viresh Kumar <viresh.linux@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
198 lines
4.6 KiB
C
198 lines
4.6 KiB
C
/*
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* arch/arm/mach-spear13xx/spear13xx.c
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*
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* SPEAr13XX machines common source file
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*
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* Copyright (C) 2012 ST Microelectronics
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* Viresh Kumar <viresh.linux@gmail.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#define pr_fmt(fmt) "SPEAr13xx: " fmt
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#include <linux/amba/pl022.h>
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#include <linux/clk.h>
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#include <linux/dw_dmac.h>
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#include <linux/err.h>
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#include <linux/of_irq.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <asm/hardware/gic.h>
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#include <asm/mach/map.h>
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#include <asm/smp_twd.h>
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#include <mach/dma.h>
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#include <mach/generic.h>
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#include <mach/spear.h>
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/* common dw_dma filter routine to be used by peripherals */
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bool dw_dma_filter(struct dma_chan *chan, void *slave)
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{
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struct dw_dma_slave *dws = (struct dw_dma_slave *)slave;
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if (chan->device->dev == dws->dma_dev) {
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chan->private = slave;
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return true;
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} else {
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return false;
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}
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}
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/* ssp device registration */
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static struct dw_dma_slave ssp_dma_param[] = {
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{
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/* Tx */
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.cfg_hi = DWC_CFGH_DST_PER(DMA_REQ_SSP0_TX),
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.cfg_lo = 0,
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.src_master = DMA_MASTER_MEMORY,
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.dst_master = DMA_MASTER_SSP0,
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}, {
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/* Rx */
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.cfg_hi = DWC_CFGH_SRC_PER(DMA_REQ_SSP0_RX),
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.cfg_lo = 0,
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.src_master = DMA_MASTER_SSP0,
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.dst_master = DMA_MASTER_MEMORY,
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}
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};
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struct pl022_ssp_controller pl022_plat_data = {
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.bus_id = 0,
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.enable_dma = 1,
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.dma_filter = dw_dma_filter,
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.dma_rx_param = &ssp_dma_param[1],
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.dma_tx_param = &ssp_dma_param[0],
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.num_chipselect = 3,
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};
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/* CF device registration */
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struct dw_dma_slave cf_dma_priv = {
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.cfg_hi = 0,
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.cfg_lo = 0,
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.src_master = 0,
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.dst_master = 0,
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};
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/* dmac device registeration */
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struct dw_dma_platform_data dmac_plat_data = {
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.nr_channels = 8,
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.chan_allocation_order = CHAN_ALLOCATION_DESCENDING,
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.chan_priority = CHAN_PRIORITY_DESCENDING,
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};
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void __init spear13xx_l2x0_init(void)
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{
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/*
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* 512KB (64KB/way), 8-way associativity, parity supported
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*
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* FIXME: 9th bit, of Auxillary Controller register must be set
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* for some spear13xx devices for stable L2 operation.
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*
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* Enable Early BRESP, L2 prefetch for Instruction and Data,
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* write alloc and 'Full line of zero' options
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*
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*/
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writel_relaxed(0x06, VA_L2CC_BASE + L2X0_PREFETCH_CTRL);
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/*
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* Program following latencies in order to make
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* SPEAr1340 work at 600 MHz
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*/
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writel_relaxed(0x221, VA_L2CC_BASE + L2X0_TAG_LATENCY_CTRL);
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writel_relaxed(0x441, VA_L2CC_BASE + L2X0_DATA_LATENCY_CTRL);
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l2x0_init(VA_L2CC_BASE, 0x70A60001, 0xfe00ffff);
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}
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/*
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* Following will create 16MB static virtual/physical mappings
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* PHYSICAL VIRTUAL
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* 0xB3000000 0xFE000000
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* 0xE0000000 0xFD000000
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* 0xEC000000 0xFC000000
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* 0xED000000 0xFB000000
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*/
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struct map_desc spear13xx_io_desc[] __initdata = {
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{
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.virtual = VA_PERIP_GRP2_BASE,
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.pfn = __phys_to_pfn(PERIP_GRP2_BASE),
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.length = SZ_16M,
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.type = MT_DEVICE
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}, {
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.virtual = VA_PERIP_GRP1_BASE,
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.pfn = __phys_to_pfn(PERIP_GRP1_BASE),
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.length = SZ_16M,
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.type = MT_DEVICE
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}, {
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.virtual = VA_A9SM_AND_MPMC_BASE,
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.pfn = __phys_to_pfn(A9SM_AND_MPMC_BASE),
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.length = SZ_16M,
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.type = MT_DEVICE
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}, {
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.virtual = (unsigned long)VA_L2CC_BASE,
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.pfn = __phys_to_pfn(L2CC_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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},
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};
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/* This will create static memory mapping for selected devices */
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void __init spear13xx_map_io(void)
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{
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iotable_init(spear13xx_io_desc, ARRAY_SIZE(spear13xx_io_desc));
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}
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static void __init spear13xx_clk_init(void)
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{
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if (of_machine_is_compatible("st,spear1310"))
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spear1310_clk_init();
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else if (of_machine_is_compatible("st,spear1340"))
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spear1340_clk_init();
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else
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pr_err("%s: Unknown machine\n", __func__);
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}
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static void __init spear13xx_timer_init(void)
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{
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char pclk_name[] = "osc_24m_clk";
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struct clk *gpt_clk, *pclk;
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spear13xx_clk_init();
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/* get the system timer clock */
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gpt_clk = clk_get_sys("gpt0", NULL);
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if (IS_ERR(gpt_clk)) {
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pr_err("%s:couldn't get clk for gpt\n", __func__);
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BUG();
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}
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/* get the suitable parent clock for timer*/
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pclk = clk_get(NULL, pclk_name);
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if (IS_ERR(pclk)) {
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pr_err("%s:couldn't get %s as parent for gpt\n", __func__,
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pclk_name);
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BUG();
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}
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clk_set_parent(gpt_clk, pclk);
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clk_put(gpt_clk);
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clk_put(pclk);
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spear_setup_of_timer();
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twd_local_timer_of_register();
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}
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struct sys_timer spear13xx_timer = {
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.init = spear13xx_timer_init,
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};
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static const struct of_device_id gic_of_match[] __initconst = {
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{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init },
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{ /* Sentinel */ }
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};
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void __init spear13xx_dt_init_irq(void)
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{
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of_irq_init(gic_of_match);
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}
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