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-rw-r--r--arch/arm/mach-spear13xx/spear13xx.c197
1 files changed, 197 insertions, 0 deletions
diff --git a/arch/arm/mach-spear13xx/spear13xx.c b/arch/arm/mach-spear13xx/spear13xx.c
new file mode 100644
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--- /dev/null
+++ b/arch/arm/mach-spear13xx/spear13xx.c
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+/*
+ * arch/arm/mach-spear13xx/spear13xx.c
+ *
+ * SPEAr13XX machines common source file
+ *
+ * Copyright (C) 2012 ST Microelectronics
+ * Viresh Kumar <viresh.linux@gmail.com>
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) "SPEAr13xx: " fmt
+
+#include <linux/amba/pl022.h>
+#include <linux/clk.h>
+#include <linux/dw_dmac.h>
+#include <linux/err.h>
+#include <linux/of_irq.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/hardware/gic.h>
+#include <asm/mach/map.h>
+#include <asm/smp_twd.h>
+#include <mach/dma.h>
+#include <mach/generic.h>
+#include <mach/spear.h>
+
+/* common dw_dma filter routine to be used by peripherals */
+bool dw_dma_filter(struct dma_chan *chan, void *slave)
+{
+ struct dw_dma_slave *dws = (struct dw_dma_slave *)slave;
+
+ if (chan->device->dev == dws->dma_dev) {
+ chan->private = slave;
+ return true;
+ } else {
+ return false;
+ }
+}
+
+/* ssp device registration */
+static struct dw_dma_slave ssp_dma_param[] = {
+ {
+ /* Tx */
+ .cfg_hi = DWC_CFGH_DST_PER(DMA_REQ_SSP0_TX),
+ .cfg_lo = 0,
+ .src_master = DMA_MASTER_MEMORY,
+ .dst_master = DMA_MASTER_SSP0,
+ }, {
+ /* Rx */
+ .cfg_hi = DWC_CFGH_SRC_PER(DMA_REQ_SSP0_RX),
+ .cfg_lo = 0,
+ .src_master = DMA_MASTER_SSP0,
+ .dst_master = DMA_MASTER_MEMORY,
+ }
+};
+
+struct pl022_ssp_controller pl022_plat_data = {
+ .bus_id = 0,
+ .enable_dma = 1,
+ .dma_filter = dw_dma_filter,
+ .dma_rx_param = &ssp_dma_param[1],
+ .dma_tx_param = &ssp_dma_param[0],
+ .num_chipselect = 3,
+};
+
+/* CF device registration */
+struct dw_dma_slave cf_dma_priv = {
+ .cfg_hi = 0,
+ .cfg_lo = 0,
+ .src_master = 0,
+ .dst_master = 0,
+};
+
+/* dmac device registeration */
+struct dw_dma_platform_data dmac_plat_data = {
+ .nr_channels = 8,
+ .chan_allocation_order = CHAN_ALLOCATION_DESCENDING,
+ .chan_priority = CHAN_PRIORITY_DESCENDING,
+};
+
+void __init spear13xx_l2x0_init(void)
+{
+ /*
+ * 512KB (64KB/way), 8-way associativity, parity supported
+ *
+ * FIXME: 9th bit, of Auxillary Controller register must be set
+ * for some spear13xx devices for stable L2 operation.
+ *
+ * Enable Early BRESP, L2 prefetch for Instruction and Data,
+ * write alloc and 'Full line of zero' options
+ *
+ */
+
+ writel_relaxed(0x06, VA_L2CC_BASE + L2X0_PREFETCH_CTRL);
+
+ /*
+ * Program following latencies in order to make
+ * SPEAr1340 work at 600 MHz
+ */
+ writel_relaxed(0x221, VA_L2CC_BASE + L2X0_TAG_LATENCY_CTRL);
+ writel_relaxed(0x441, VA_L2CC_BASE + L2X0_DATA_LATENCY_CTRL);
+ l2x0_init(VA_L2CC_BASE, 0x70A60001, 0xfe00ffff);
+}
+
+/*
+ * Following will create 16MB static virtual/physical mappings
+ * PHYSICAL VIRTUAL
+ * 0xB3000000 0xFE000000
+ * 0xE0000000 0xFD000000
+ * 0xEC000000 0xFC000000
+ * 0xED000000 0xFB000000
+ */
+struct map_desc spear13xx_io_desc[] __initdata = {
+ {
+ .virtual = VA_PERIP_GRP2_BASE,
+ .pfn = __phys_to_pfn(PERIP_GRP2_BASE),
+ .length = SZ_16M,
+ .type = MT_DEVICE
+ }, {
+ .virtual = VA_PERIP_GRP1_BASE,
+ .pfn = __phys_to_pfn(PERIP_GRP1_BASE),
+ .length = SZ_16M,
+ .type = MT_DEVICE
+ }, {
+ .virtual = VA_A9SM_AND_MPMC_BASE,
+ .pfn = __phys_to_pfn(A9SM_AND_MPMC_BASE),
+ .length = SZ_16M,
+ .type = MT_DEVICE
+ }, {
+ .virtual = (unsigned long)VA_L2CC_BASE,
+ .pfn = __phys_to_pfn(L2CC_BASE),
+ .length = SZ_4K,
+ .type = MT_DEVICE
+ },
+};
+
+/* This will create static memory mapping for selected devices */
+void __init spear13xx_map_io(void)
+{
+ iotable_init(spear13xx_io_desc, ARRAY_SIZE(spear13xx_io_desc));
+}
+
+static void __init spear13xx_clk_init(void)
+{
+ if (of_machine_is_compatible("st,spear1310"))
+ spear1310_clk_init();
+ else if (of_machine_is_compatible("st,spear1340"))
+ spear1340_clk_init();
+ else
+ pr_err("%s: Unknown machine\n", __func__);
+}
+
+static void __init spear13xx_timer_init(void)
+{
+ char pclk_name[] = "osc_24m_clk";
+ struct clk *gpt_clk, *pclk;
+
+ spear13xx_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();
+ twd_local_timer_of_register();
+}
+
+struct sys_timer spear13xx_timer = {
+ .init = spear13xx_timer_init,
+};
+
+static const struct of_device_id gic_of_match[] __initconst = {
+ { .compatible = "arm,cortex-a9-gic", .data = gic_of_init },
+ { /* Sentinel */ }
+};
+
+void __init spear13xx_dt_init_irq(void)
+{
+ of_irq_init(gic_of_match);
+}