From: Eduardo Valentin <eduardo.valentin@xxxxxxxxxxx>
This patch adds support for mach-omap2 based on current
mcbsp platform driver.
Signed-off-by: Eduardo Valentin <eduardo.valentin@xxxxxxxxxxx>
---
arch/arm/mach-omap2/Makefile | 2 +
arch/arm/mach-omap2/mcbsp.c | 190 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 192 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/mcbsp.c
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index b617b66..28fa823 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -7,6 +7,8 @@ obj-y := irq.o id.o io.o memory.o control.o prcm.o clock.o mux.o \
devices.o serial.o gpmc.o timer-gp.o powerdomain.o \
clockdomain.o
+obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
+
# Functions loaded to SRAM
obj-$(CONFIG_ARCH_OMAP2) += sram24xx.o
obj-$(CONFIG_ARCH_OMAP3) += sram34xx.o
diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c
new file mode 100644
index 0000000..6281b53
--- /dev/null
+++ b/arch/arm/mach-omap2/mcbsp.c
@@ -0,0 +1,190 @@
+/*
+ * linux/arch/arm/mach-omap2/mcbsp.c
+ *
+ * Copyright (C) 2008 Instituto Nokia de Tecnologia
+ * Contact: Eduardo Valentin <eduardo.valentin@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Multichannel mode not supported.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+
+#include <asm/arch/dma.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/mcbsp.h>
+
+struct mcbsp_internal_clk {
+ struct clk clk;
+ struct clk **childs;
+ int n_childs;
+};
+
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+static void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk)
+{
+ const char *clk_names[] = { "mcbsp_ick", "mcbsp_fck" };
+ int i;
+
+ mclk->n_childs = ARRAY_SIZE(clk_names);
+ mclk->childs = kzalloc(mclk->n_childs * sizeof(struct clk *),
+ GFP_KERNEL);
+
+ for (i = 0; i < mclk->n_childs; i++) {
+ /* We fake a platform device to get correct device id */
+ struct platform_device pdev;
+
+ pdev.dev.bus = &platform_bus_type;
+ pdev.id = mclk->clk.id;
+ mclk->childs[i] = clk_get(&pdev.dev, clk_names[i]);
+ if (IS_ERR(mclk->childs[i]))
+ printk(KERN_ERR "Could not get clock %s (%d).\n",
+ clk_names[i], mclk->clk.id);
+ }
+}
+
+static int omap_mcbsp_clk_enable(struct clk *clk)
+{
+ struct mcbsp_internal_clk *mclk = container_of(clk,
+ struct mcbsp_internal_clk, clk);
+ int i;
+
+ for (i = 0; i < mclk->n_childs; i++)
+ clk_enable(mclk->childs[i]);
+ return 0;
+}
+
+static void omap_mcbsp_clk_disable(struct clk *clk)
+{
+ struct mcbsp_internal_clk *mclk = container_of(clk,
+ struct mcbsp_internal_clk, clk);
+ int i;
+
+ for (i = 0; i < mclk->n_childs; i++)
+ clk_disable(mclk->childs[i]);
+}
+
+static struct mcbsp_internal_clk omap_mcbsp_clks[] = {
+ {
+ .clk = {
+ .name = "mcbsp_clk",
+ .id = 1,
+ .enable = omap_mcbsp_clk_enable,
+ .disable = omap_mcbsp_clk_disable,
+ },
+ },
+ {
+ .clk = {
+ .name = "mcbsp_clk",
+ .id = 2,
+ .enable = omap_mcbsp_clk_enable,
+ .disable = omap_mcbsp_clk_disable,
+ },
+ },
+};
+#define omap_mcbsp_clks_size ARRAY_SIZE(omap_mcbsp_clks)
+#else
+#define omap_mcbsp_clks NULL
+#define omap_mcbsp_clks_size 0
+static inline void omap_mcbsp_clk_init(struct clk *clk)
+{ }
+#endif
+
+static void omap2_mcbsp2_mux_setup(void)
+{
+ omap_cfg_reg(Y15_24XX_MCBSP2_CLKX);
+ omap_cfg_reg(R14_24XX_MCBSP2_FSX);
+ omap_cfg_reg(W15_24XX_MCBSP2_DR);
+ omap_cfg_reg(V15_24XX_MCBSP2_DX);
+ omap_cfg_reg(V14_24XX_GPIO117);
+ /*
+ * TODO: Need to add MUX settings for OMAP 2430 SDP
+ */
+}
+
+static void omap2_mcbsp_request(unsigned int id)
+{
+ if (cpu_is_omap2420() && (id == OMAP_MCBSP2))
+ omap2_mcbsp2_mux_setup();
+}
+
+static int omap2_mcbsp_check(unsigned int id)
+{
+ if (id > OMAP_MAX_MCBSP_COUNT - 1) {
+ printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static struct omap_mcbsp_ops omap2_mcbsp_ops = {
+ .request = omap2_mcbsp_request,
+ .check = omap2_mcbsp_check,
+};
+
+static struct omap_mcbsp_platform_data omap2_mcbsp_pdata[] = {
+#ifdef CONFIG_ARCH_OMAP24XX
+ {
+ .virt_base = IO_ADDRESS(OMAP24XX_MCBSP1_BASE),
+ .dma_rx_sync = OMAP24XX_DMA_MCBSP1_RX,
+ .dma_tx_sync = OMAP24XX_DMA_MCBSP1_TX,
+ .rx_irq = INT_24XX_MCBSP1_IRQ_RX,
+ .tx_irq = INT_24XX_MCBSP1_IRQ_TX,
+ .ops = &omap2_mcbsp_ops,
+ .clk_name = "mcbsp_clk",
+ },
+ {
+ .virt_base = IO_ADDRESS(OMAP24XX_MCBSP2_BASE),
+ .dma_rx_sync = OMAP24XX_DMA_MCBSP2_RX,
+ .dma_tx_sync = OMAP24XX_DMA_MCBSP2_TX,
+ .rx_irq = INT_24XX_MCBSP2_IRQ_RX,
+ .tx_irq = INT_24XX_MCBSP2_IRQ_TX,
+ .ops = &omap2_mcbsp_ops,
+ .clk_name = "mcbsp_clk",
+ },
+#endif
+#ifdef CONFIG_ARCH_OMAP34XX
+ {
+ .virt_base = IO_ADDRESS(OMAP34XX_MCBSP1_BASE),
+ .dma_rx_sync = OMAP24XX_DMA_MCBSP1_RX,
+ .dma_tx_sync = OMAP24XX_DMA_MCBSP1_TX,
+ .rx_irq = INT_24XX_MCBSP1_IRQ_RX,
+ .tx_irq = INT_24XX_MCBSP1_IRQ_TX,
+ .ops = &omap2_mcbsp_ops,
+ .clk_name = "mcbsp_clk",
+ },
+ {
+ .virt_base = IO_ADDRESS(OMAP34XX_MCBSP2_BASE),
+ .dma_rx_sync = OMAP24XX_DMA_MCBSP2_RX,
+ .dma_tx_sync = OMAP24XX_DMA_MCBSP2_TX,
+ .rx_irq = INT_24XX_MCBSP2_IRQ_RX,
+ .tx_irq = INT_24XX_MCBSP2_IRQ_TX,
+ .ops = &omap2_mcbsp_ops,
+ .clk_name = "mcbsp_clk",
+ },
+#endif
+};
+#define mcbsp_count ARRAY_SIZE(omap2_mcbsp_pdata)
+
+int __init omap2_mcbsp_init(void)
+{
+ int i;
+
+ for (i = 0; i < omap_mcbsp_clks_size; i++) {
+ /* Once we call clk_get inside init, we do not register it */
+ omap_mcbsp_clk_init(&omap_mcbsp_clks[i]);
+ clk_register(&omap_mcbsp_clks[i].clk);
+ }
+
+ omap_mcbsp_register_board_cfg(omap2_mcbsp_pdata, mcbsp_count);
+
+ return omap_mcbsp_init();
+}
+arch_initcall(omap2_mcbsp_init);
--
1.5.5.GIT
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