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path: root/drivers/media/platform/davinci/vpss.c
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Diffstat (limited to 'drivers/media/platform/davinci/vpss.c')
-rw-r--r--drivers/media/platform/davinci/vpss.c482
1 files changed, 482 insertions, 0 deletions
diff --git a/drivers/media/platform/davinci/vpss.c b/drivers/media/platform/davinci/vpss.c
new file mode 100644
index 000000000000..146e4b01ac17
--- /dev/null
+++ b/drivers/media/platform/davinci/vpss.c
@@ -0,0 +1,482 @@
+/*
+ * Copyright (C) 2009 Texas Instruments.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * common vpss system module platform driver for all video drivers.
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/compiler.h>
+#include <linux/io.h>
+#include <mach/hardware.h>
+#include <media/davinci/vpss.h>
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("VPSS Driver");
+MODULE_AUTHOR("Texas Instruments");
+
+/* DM644x defines */
+#define DM644X_SBL_PCR_VPSS (4)
+
+#define DM355_VPSSBL_INTSEL 0x10
+#define DM355_VPSSBL_EVTSEL 0x14
+/* vpss BL register offsets */
+#define DM355_VPSSBL_CCDCMUX 0x1c
+/* vpss CLK register offsets */
+#define DM355_VPSSCLK_CLKCTRL 0x04
+/* masks and shifts */
+#define VPSS_HSSISEL_SHIFT 4
+/*
+ * VDINT0 - vpss_int0, VDINT1 - vpss_int1, H3A - vpss_int4,
+ * IPIPE_INT1_SDR - vpss_int5
+ */
+#define DM355_VPSSBL_INTSEL_DEFAULT 0xff83ff10
+/* VENCINT - vpss_int8 */
+#define DM355_VPSSBL_EVTSEL_DEFAULT 0x4
+
+#define DM365_ISP5_PCCR 0x04
+#define DM365_ISP5_INTSEL1 0x10
+#define DM365_ISP5_INTSEL2 0x14
+#define DM365_ISP5_INTSEL3 0x18
+#define DM365_ISP5_CCDCMUX 0x20
+#define DM365_ISP5_PG_FRAME_SIZE 0x28
+#define DM365_VPBE_CLK_CTRL 0x00
+/*
+ * vpss interrupts. VDINT0 - vpss_int0, VDINT1 - vpss_int1,
+ * AF - vpss_int3
+ */
+#define DM365_ISP5_INTSEL1_DEFAULT 0x0b1f0100
+/* AEW - vpss_int6, RSZ_INT_DMA - vpss_int5 */
+#define DM365_ISP5_INTSEL2_DEFAULT 0x1f0a0f1f
+/* VENC - vpss_int8 */
+#define DM365_ISP5_INTSEL3_DEFAULT 0x00000015
+
+/* masks and shifts for DM365*/
+#define DM365_CCDC_PG_VD_POL_SHIFT 0
+#define DM365_CCDC_PG_HD_POL_SHIFT 1
+
+#define CCD_SRC_SEL_MASK (BIT_MASK(5) | BIT_MASK(4))
+#define CCD_SRC_SEL_SHIFT 4
+
+/* Different SoC platforms supported by this driver */
+enum vpss_platform_type {
+ DM644X,
+ DM355,
+ DM365,
+};
+
+/*
+ * vpss operations. Depends on platform. Not all functions are available
+ * on all platforms. The api, first check if a functio is available before
+ * invoking it. In the probe, the function ptrs are initialized based on
+ * vpss name. vpss name can be "dm355_vpss", "dm644x_vpss" etc.
+ */
+struct vpss_hw_ops {
+ /* enable clock */
+ int (*enable_clock)(enum vpss_clock_sel clock_sel, int en);
+ /* select input to ccdc */
+ void (*select_ccdc_source)(enum vpss_ccdc_source_sel src_sel);
+ /* clear wbl overflow bit */
+ int (*clear_wbl_overflow)(enum vpss_wbl_sel wbl_sel);
+};
+
+/* vpss configuration */
+struct vpss_oper_config {
+ __iomem void *vpss_regs_base0;
+ __iomem void *vpss_regs_base1;
+ enum vpss_platform_type platform;
+ spinlock_t vpss_lock;
+ struct vpss_hw_ops hw_ops;
+};
+
+static struct vpss_oper_config oper_cfg;
+
+/* register access routines */
+static inline u32 bl_regr(u32 offset)
+{
+ return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
+}
+
+static inline void bl_regw(u32 val, u32 offset)
+{
+ __raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
+}
+
+static inline u32 vpss_regr(u32 offset)
+{
+ return __raw_readl(oper_cfg.vpss_regs_base1 + offset);
+}
+
+static inline void vpss_regw(u32 val, u32 offset)
+{
+ __raw_writel(val, oper_cfg.vpss_regs_base1 + offset);
+}
+
+/* For DM365 only */
+static inline u32 isp5_read(u32 offset)
+{
+ return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
+}
+
+/* For DM365 only */
+static inline void isp5_write(u32 val, u32 offset)
+{
+ __raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
+}
+
+static void dm365_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
+{
+ u32 temp = isp5_read(DM365_ISP5_CCDCMUX) & ~CCD_SRC_SEL_MASK;
+
+ /* if we are using pattern generator, enable it */
+ if (src_sel == VPSS_PGLPBK || src_sel == VPSS_CCDCPG)
+ temp |= 0x08;
+
+ temp |= (src_sel << CCD_SRC_SEL_SHIFT);
+ isp5_write(temp, DM365_ISP5_CCDCMUX);
+}
+
+static void dm355_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
+{
+ bl_regw(src_sel << VPSS_HSSISEL_SHIFT, DM355_VPSSBL_CCDCMUX);
+}
+
+int vpss_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
+{
+ if (!oper_cfg.hw_ops.select_ccdc_source)
+ return -EINVAL;
+
+ oper_cfg.hw_ops.select_ccdc_source(src_sel);
+ return 0;
+}
+EXPORT_SYMBOL(vpss_select_ccdc_source);
+
+static int dm644x_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
+{
+ u32 mask = 1, val;
+
+ if (wbl_sel < VPSS_PCR_AEW_WBL_0 ||
+ wbl_sel > VPSS_PCR_CCDC_WBL_O)
+ return -EINVAL;
+
+ /* writing a 0 clear the overflow */
+ mask = ~(mask << wbl_sel);
+ val = bl_regr(DM644X_SBL_PCR_VPSS) & mask;
+ bl_regw(val, DM644X_SBL_PCR_VPSS);
+ return 0;
+}
+
+int vpss_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
+{
+ if (!oper_cfg.hw_ops.clear_wbl_overflow)
+ return -EINVAL;
+
+ return oper_cfg.hw_ops.clear_wbl_overflow(wbl_sel);
+}
+EXPORT_SYMBOL(vpss_clear_wbl_overflow);
+
+/*
+ * dm355_enable_clock - Enable VPSS Clock
+ * @clock_sel: CLock to be enabled/disabled
+ * @en: enable/disable flag
+ *
+ * This is called to enable or disable a vpss clock
+ */
+static int dm355_enable_clock(enum vpss_clock_sel clock_sel, int en)
+{
+ unsigned long flags;
+ u32 utemp, mask = 0x1, shift = 0;
+
+ switch (clock_sel) {
+ case VPSS_VPBE_CLOCK:
+ /* nothing since lsb */
+ break;
+ case VPSS_VENC_CLOCK_SEL:
+ shift = 2;
+ break;
+ case VPSS_CFALD_CLOCK:
+ shift = 3;
+ break;
+ case VPSS_H3A_CLOCK:
+ shift = 4;
+ break;
+ case VPSS_IPIPE_CLOCK:
+ shift = 5;
+ break;
+ case VPSS_CCDC_CLOCK:
+ shift = 6;
+ break;
+ default:
+ printk(KERN_ERR "dm355_enable_clock:"
+ " Invalid selector: %d\n", clock_sel);
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
+ utemp = vpss_regr(DM355_VPSSCLK_CLKCTRL);
+ if (!en)
+ utemp &= ~(mask << shift);
+ else
+ utemp |= (mask << shift);
+
+ vpss_regw(utemp, DM355_VPSSCLK_CLKCTRL);
+ spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);
+ return 0;
+}
+
+static int dm365_enable_clock(enum vpss_clock_sel clock_sel, int en)
+{
+ unsigned long flags;
+ u32 utemp, mask = 0x1, shift = 0, offset = DM365_ISP5_PCCR;
+ u32 (*read)(u32 offset) = isp5_read;
+ void(*write)(u32 val, u32 offset) = isp5_write;
+
+ switch (clock_sel) {
+ case VPSS_BL_CLOCK:
+ break;
+ case VPSS_CCDC_CLOCK:
+ shift = 1;
+ break;
+ case VPSS_H3A_CLOCK:
+ shift = 2;
+ break;
+ case VPSS_RSZ_CLOCK:
+ shift = 3;
+ break;
+ case VPSS_IPIPE_CLOCK:
+ shift = 4;
+ break;
+ case VPSS_IPIPEIF_CLOCK:
+ shift = 5;
+ break;
+ case VPSS_PCLK_INTERNAL:
+ shift = 6;
+ break;
+ case VPSS_PSYNC_CLOCK_SEL:
+ shift = 7;
+ break;
+ case VPSS_VPBE_CLOCK:
+ read = vpss_regr;
+ write = vpss_regw;
+ offset = DM365_VPBE_CLK_CTRL;
+ break;
+ case VPSS_VENC_CLOCK_SEL:
+ shift = 2;
+ read = vpss_regr;
+ write = vpss_regw;
+ offset = DM365_VPBE_CLK_CTRL;
+ break;
+ case VPSS_LDC_CLOCK:
+ shift = 3;
+ read = vpss_regr;
+ write = vpss_regw;
+ offset = DM365_VPBE_CLK_CTRL;
+ break;
+ case VPSS_FDIF_CLOCK:
+ shift = 4;
+ read = vpss_regr;
+ write = vpss_regw;
+ offset = DM365_VPBE_CLK_CTRL;
+ break;
+ case VPSS_OSD_CLOCK_SEL:
+ shift = 6;
+ read = vpss_regr;
+ write = vpss_regw;
+ offset = DM365_VPBE_CLK_CTRL;
+ break;
+ case VPSS_LDC_CLOCK_SEL:
+ shift = 7;
+ read = vpss_regr;
+ write = vpss_regw;
+ offset = DM365_VPBE_CLK_CTRL;
+ break;
+ default:
+ printk(KERN_ERR "dm365_enable_clock: Invalid selector: %d\n",
+ clock_sel);
+ return -1;
+ }
+
+ spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
+ utemp = read(offset);
+ if (!en) {
+ mask = ~mask;
+ utemp &= (mask << shift);
+ } else
+ utemp |= (mask << shift);
+
+ write(utemp, offset);
+ spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);
+
+ return 0;
+}
+
+int vpss_enable_clock(enum vpss_clock_sel clock_sel, int en)
+{
+ if (!oper_cfg.hw_ops.enable_clock)
+ return -EINVAL;
+
+ return oper_cfg.hw_ops.enable_clock(clock_sel, en);
+}
+EXPORT_SYMBOL(vpss_enable_clock);
+
+void dm365_vpss_set_sync_pol(struct vpss_sync_pol sync)
+{
+ int val = 0;
+ val = isp5_read(DM365_ISP5_CCDCMUX);
+
+ val |= (sync.ccdpg_hdpol << DM365_CCDC_PG_HD_POL_SHIFT);
+ val |= (sync.ccdpg_vdpol << DM365_CCDC_PG_VD_POL_SHIFT);
+
+ isp5_write(val, DM365_ISP5_CCDCMUX);
+}
+EXPORT_SYMBOL(dm365_vpss_set_sync_pol);
+
+void dm365_vpss_set_pg_frame_size(struct vpss_pg_frame_size frame_size)
+{
+ int current_reg = ((frame_size.hlpfr >> 1) - 1) << 16;
+
+ current_reg |= (frame_size.pplen - 1);
+ isp5_write(current_reg, DM365_ISP5_PG_FRAME_SIZE);
+}
+EXPORT_SYMBOL(dm365_vpss_set_pg_frame_size);
+
+static int __devinit vpss_probe(struct platform_device *pdev)
+{
+ struct resource *r1, *r2;
+ char *platform_name;
+ int status;
+
+ if (!pdev->dev.platform_data) {
+ dev_err(&pdev->dev, "no platform data\n");
+ return -ENOENT;
+ }
+
+ platform_name = pdev->dev.platform_data;
+ if (!strcmp(platform_name, "dm355_vpss"))
+ oper_cfg.platform = DM355;
+ else if (!strcmp(platform_name, "dm365_vpss"))
+ oper_cfg.platform = DM365;
+ else if (!strcmp(platform_name, "dm644x_vpss"))
+ oper_cfg.platform = DM644X;
+ else {
+ dev_err(&pdev->dev, "vpss driver not supported on"
+ " this platform\n");
+ return -ENODEV;
+ }
+
+ dev_info(&pdev->dev, "%s vpss probed\n", platform_name);
+ r1 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r1)
+ return -ENOENT;
+
+ r1 = request_mem_region(r1->start, resource_size(r1), r1->name);
+ if (!r1)
+ return -EBUSY;
+
+ oper_cfg.vpss_regs_base0 = ioremap(r1->start, resource_size(r1));
+ if (!oper_cfg.vpss_regs_base0) {
+ status = -EBUSY;
+ goto fail1;
+ }
+
+ if (oper_cfg.platform == DM355 || oper_cfg.platform == DM365) {
+ r2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!r2) {
+ status = -ENOENT;
+ goto fail2;
+ }
+ r2 = request_mem_region(r2->start, resource_size(r2), r2->name);
+ if (!r2) {
+ status = -EBUSY;
+ goto fail2;
+ }
+
+ oper_cfg.vpss_regs_base1 = ioremap(r2->start,
+ resource_size(r2));
+ if (!oper_cfg.vpss_regs_base1) {
+ status = -EBUSY;
+ goto fail3;
+ }
+ }
+
+ if (oper_cfg.platform == DM355) {
+ oper_cfg.hw_ops.enable_clock = dm355_enable_clock;
+ oper_cfg.hw_ops.select_ccdc_source = dm355_select_ccdc_source;
+ /* Setup vpss interrupts */
+ bl_regw(DM355_VPSSBL_INTSEL_DEFAULT, DM355_VPSSBL_INTSEL);
+ bl_regw(DM355_VPSSBL_EVTSEL_DEFAULT, DM355_VPSSBL_EVTSEL);
+ } else if (oper_cfg.platform == DM365) {
+ oper_cfg.hw_ops.enable_clock = dm365_enable_clock;
+ oper_cfg.hw_ops.select_ccdc_source = dm365_select_ccdc_source;
+ /* Setup vpss interrupts */
+ isp5_write(DM365_ISP5_INTSEL1_DEFAULT, DM365_ISP5_INTSEL1);
+ isp5_write(DM365_ISP5_INTSEL2_DEFAULT, DM365_ISP5_INTSEL2);
+ isp5_write(DM365_ISP5_INTSEL3_DEFAULT, DM365_ISP5_INTSEL3);
+ } else
+ oper_cfg.hw_ops.clear_wbl_overflow = dm644x_clear_wbl_overflow;
+
+ spin_lock_init(&oper_cfg.vpss_lock);
+ dev_info(&pdev->dev, "%s vpss probe success\n", platform_name);
+ return 0;
+
+fail3:
+ release_mem_region(r2->start, resource_size(r2));
+fail2:
+ iounmap(oper_cfg.vpss_regs_base0);
+fail1:
+ release_mem_region(r1->start, resource_size(r1));
+ return status;
+}
+
+static int __devexit vpss_remove(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ iounmap(oper_cfg.vpss_regs_base0);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, resource_size(res));
+ if (oper_cfg.platform == DM355 || oper_cfg.platform == DM365) {
+ iounmap(oper_cfg.vpss_regs_base1);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ release_mem_region(res->start, resource_size(res));
+ }
+ return 0;
+}
+
+static struct platform_driver vpss_driver = {
+ .driver = {
+ .name = "vpss",
+ .owner = THIS_MODULE,
+ },
+ .remove = __devexit_p(vpss_remove),
+ .probe = vpss_probe,
+};
+
+static void vpss_exit(void)
+{
+ platform_driver_unregister(&vpss_driver);
+}
+
+static int __init vpss_init(void)
+{
+ return platform_driver_register(&vpss_driver);
+}
+subsys_initcall(vpss_init);
+module_exit(vpss_exit);

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