i2c: tegra: Add stub runtime power management
[linux-2.6.git] / drivers / video / cyber2000fb.c
index 41d6263..8503807 100644 (file)
 #include <linux/fb.h>
 #include <linux/pci.h>
 #include <linux/init.h>
+#include <linux/io.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
 
-#include <asm/io.h>
 #include <asm/pgtable.h>
 #include <asm/system.h>
 
@@ -61,10 +63,10 @@ struct cfb_info {
        struct fb_info          fb;
        struct display_switch   *dispsw;
        struct display          *display;
-       struct pci_dev          *dev;
        unsigned char           __iomem *region;
        unsigned char           __iomem *regs;
        u_int                   id;
+       u_int                   irq;
        int                     func_use_count;
        u_long                  ref_ps;
 
@@ -88,6 +90,19 @@ struct cfb_info {
        u_char                  ramdac_powerdown;
 
        u32                     pseudo_palette[16];
+
+       spinlock_t              reg_b0_lock;
+
+#ifdef CONFIG_FB_CYBER2000_DDC
+       bool                    ddc_registered;
+       struct i2c_adapter      ddc_adapter;
+       struct i2c_algo_bit_data        ddc_algo;
+#endif
+
+#ifdef CONFIG_FB_CYBER2000_I2C
+       struct i2c_adapter      i2c_adapter;
+       struct i2c_algo_bit_data i2c_algo;
+#endif
 };
 
 static char *default_font = "Acorn8x8";
@@ -388,6 +403,7 @@ cyber2000fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
                pseudo_val |= convert_bitfield(red, &var->red);
                pseudo_val |= convert_bitfield(green, &var->green);
                pseudo_val |= convert_bitfield(blue, &var->blue);
+               ret = 0;
                break;
        }
 
@@ -436,6 +452,8 @@ static void cyber2000fb_write_ramdac_ctrl(struct cfb_info *cfb)
        cyber2000fb_writeb(i | 4, 0x3cf, cfb);
        cyber2000fb_writeb(val, 0x3c6, cfb);
        cyber2000fb_writeb(i, 0x3cf, cfb);
+       /* prevent card lock-up observed on x86 with CyberPro 2000 */
+       cyber2000fb_readb(0x3cf, cfb);
 }
 
 static void cyber2000fb_set_timing(struct cfb_info *cfb, struct par_info *hw)
@@ -491,6 +509,7 @@ static void cyber2000fb_set_timing(struct cfb_info *cfb, struct par_info *hw)
        cyber2000_attrw(0x14, 0x00, cfb);
 
        /* PLL registers */
+       spin_lock(&cfb->reg_b0_lock);
        cyber2000_grphw(EXT_DCLK_MULT, hw->clock_mult, cfb);
        cyber2000_grphw(EXT_DCLK_DIV, hw->clock_div, cfb);
        cyber2000_grphw(EXT_MCLK_MULT, cfb->mclk_mult, cfb);
@@ -498,6 +517,7 @@ static void cyber2000fb_set_timing(struct cfb_info *cfb, struct par_info *hw)
        cyber2000_grphw(0x90, 0x01, cfb);
        cyber2000_grphw(0xb9, 0x80, cfb);
        cyber2000_grphw(0xb9, 0x00, cfb);
+       spin_unlock(&cfb->reg_b0_lock);
 
        cfb->ramdac_ctrl = hw->ramdac;
        cyber2000fb_write_ramdac_ctrl(cfb);
@@ -678,9 +698,9 @@ cyber2000fb_decode_clock(struct par_info *hw, struct cfb_info *cfb,
         *    pll_ps_calc = best_div1 / (ref_ps * best_mult)
         */
        best_diff = 0x7fffffff;
-       best_mult = 32;
-       best_div1 = 255;
-       for (t_div1 = 32; t_div1 > 1; t_div1 -= 1) {
+       best_mult = 2;
+       best_div1 = 32;
+       for (t_div1 = 2; t_div1 < 32; t_div1 += 1) {
                u_int rr, t_mult, t_pll_ps;
                int diff;
 
@@ -1102,24 +1122,22 @@ void cyber2000fb_disable_extregs(struct cfb_info *cfb)
 }
 EXPORT_SYMBOL(cyber2000fb_disable_extregs);
 
-void cyber2000fb_get_fb_var(struct cfb_info *cfb, struct fb_var_screeninfo *var)
-{
-       memcpy(var, &cfb->fb.var, sizeof(struct fb_var_screeninfo));
-}
-EXPORT_SYMBOL(cyber2000fb_get_fb_var);
-
 /*
  * Attach a capture/tv driver to the core CyberX0X0 driver.
  */
 int cyber2000fb_attach(struct cyberpro_info *info, int idx)
 {
        if (int_cfb_info != NULL) {
-               info->dev             = int_cfb_info->dev;
+               info->dev             = int_cfb_info->fb.device;
+#ifdef CONFIG_FB_CYBER2000_I2C
+               info->i2c             = &int_cfb_info->i2c_adapter;
+#else
+               info->i2c             = NULL;
+#endif
                info->regs            = int_cfb_info->regs;
+               info->irq             = int_cfb_info->irq;
                info->fb              = int_cfb_info->fb.screen_base;
                info->fb_size         = int_cfb_info->fb.fix.smem_len;
-               info->enable_extregs  = cyber2000fb_enable_extregs;
-               info->disable_extregs = cyber2000fb_disable_extregs;
                info->info            = int_cfb_info;
 
                strlcpy(info->dev_name, int_cfb_info->fb.fix.id,
@@ -1138,6 +1156,183 @@ void cyber2000fb_detach(int idx)
 }
 EXPORT_SYMBOL(cyber2000fb_detach);
 
+#ifdef CONFIG_FB_CYBER2000_DDC
+
+#define DDC_REG                0xb0
+#define DDC_SCL_OUT    (1 << 0)
+#define DDC_SDA_OUT    (1 << 4)
+#define DDC_SCL_IN     (1 << 2)
+#define DDC_SDA_IN     (1 << 6)
+
+static void cyber2000fb_enable_ddc(struct cfb_info *cfb)
+{
+       spin_lock(&cfb->reg_b0_lock);
+       cyber2000fb_writew(0x1bf, 0x3ce, cfb);
+}
+
+static void cyber2000fb_disable_ddc(struct cfb_info *cfb)
+{
+       cyber2000fb_writew(0x0bf, 0x3ce, cfb);
+       spin_unlock(&cfb->reg_b0_lock);
+}
+
+
+static void cyber2000fb_ddc_setscl(void *data, int val)
+{
+       struct cfb_info *cfb = data;
+       unsigned char reg;
+
+       cyber2000fb_enable_ddc(cfb);
+       reg = cyber2000_grphr(DDC_REG, cfb);
+       if (!val)       /* bit is inverted */
+               reg |= DDC_SCL_OUT;
+       else
+               reg &= ~DDC_SCL_OUT;
+       cyber2000_grphw(DDC_REG, reg, cfb);
+       cyber2000fb_disable_ddc(cfb);
+}
+
+static void cyber2000fb_ddc_setsda(void *data, int val)
+{
+       struct cfb_info *cfb = data;
+       unsigned char reg;
+
+       cyber2000fb_enable_ddc(cfb);
+       reg = cyber2000_grphr(DDC_REG, cfb);
+       if (!val)       /* bit is inverted */
+               reg |= DDC_SDA_OUT;
+       else
+               reg &= ~DDC_SDA_OUT;
+       cyber2000_grphw(DDC_REG, reg, cfb);
+       cyber2000fb_disable_ddc(cfb);
+}
+
+static int cyber2000fb_ddc_getscl(void *data)
+{
+       struct cfb_info *cfb = data;
+       int retval;
+
+       cyber2000fb_enable_ddc(cfb);
+       retval = !!(cyber2000_grphr(DDC_REG, cfb) & DDC_SCL_IN);
+       cyber2000fb_disable_ddc(cfb);
+
+       return retval;
+}
+
+static int cyber2000fb_ddc_getsda(void *data)
+{
+       struct cfb_info *cfb = data;
+       int retval;
+
+       cyber2000fb_enable_ddc(cfb);
+       retval = !!(cyber2000_grphr(DDC_REG, cfb) & DDC_SDA_IN);
+       cyber2000fb_disable_ddc(cfb);
+
+       return retval;
+}
+
+static int __devinit cyber2000fb_setup_ddc_bus(struct cfb_info *cfb)
+{
+       strlcpy(cfb->ddc_adapter.name, cfb->fb.fix.id,
+               sizeof(cfb->ddc_adapter.name));
+       cfb->ddc_adapter.owner          = THIS_MODULE;
+       cfb->ddc_adapter.class          = I2C_CLASS_DDC;
+       cfb->ddc_adapter.algo_data      = &cfb->ddc_algo;
+       cfb->ddc_adapter.dev.parent     = cfb->fb.device;
+       cfb->ddc_algo.setsda            = cyber2000fb_ddc_setsda;
+       cfb->ddc_algo.setscl            = cyber2000fb_ddc_setscl;
+       cfb->ddc_algo.getsda            = cyber2000fb_ddc_getsda;
+       cfb->ddc_algo.getscl            = cyber2000fb_ddc_getscl;
+       cfb->ddc_algo.udelay            = 10;
+       cfb->ddc_algo.timeout           = 20;
+       cfb->ddc_algo.data              = cfb;
+
+       i2c_set_adapdata(&cfb->ddc_adapter, cfb);
+
+       return i2c_bit_add_bus(&cfb->ddc_adapter);
+}
+#endif /* CONFIG_FB_CYBER2000_DDC */
+
+#ifdef CONFIG_FB_CYBER2000_I2C
+static void cyber2000fb_i2c_setsda(void *data, int state)
+{
+       struct cfb_info *cfb = data;
+       unsigned int latch2;
+
+       spin_lock(&cfb->reg_b0_lock);
+       latch2 = cyber2000_grphr(EXT_LATCH2, cfb);
+       latch2 &= EXT_LATCH2_I2C_CLKEN;
+       if (state)
+               latch2 |= EXT_LATCH2_I2C_DATEN;
+       cyber2000_grphw(EXT_LATCH2, latch2, cfb);
+       spin_unlock(&cfb->reg_b0_lock);
+}
+
+static void cyber2000fb_i2c_setscl(void *data, int state)
+{
+       struct cfb_info *cfb = data;
+       unsigned int latch2;
+
+       spin_lock(&cfb->reg_b0_lock);
+       latch2 = cyber2000_grphr(EXT_LATCH2, cfb);
+       latch2 &= EXT_LATCH2_I2C_DATEN;
+       if (state)
+               latch2 |= EXT_LATCH2_I2C_CLKEN;
+       cyber2000_grphw(EXT_LATCH2, latch2, cfb);
+       spin_unlock(&cfb->reg_b0_lock);
+}
+
+static int cyber2000fb_i2c_getsda(void *data)
+{
+       struct cfb_info *cfb = data;
+       int ret;
+
+       spin_lock(&cfb->reg_b0_lock);
+       ret = !!(cyber2000_grphr(EXT_LATCH2, cfb) & EXT_LATCH2_I2C_DAT);
+       spin_unlock(&cfb->reg_b0_lock);
+
+       return ret;
+}
+
+static int cyber2000fb_i2c_getscl(void *data)
+{
+       struct cfb_info *cfb = data;
+       int ret;
+
+       spin_lock(&cfb->reg_b0_lock);
+       ret = !!(cyber2000_grphr(EXT_LATCH2, cfb) & EXT_LATCH2_I2C_CLK);
+       spin_unlock(&cfb->reg_b0_lock);
+
+       return ret;
+}
+
+static int __devinit cyber2000fb_i2c_register(struct cfb_info *cfb)
+{
+       strlcpy(cfb->i2c_adapter.name, cfb->fb.fix.id,
+               sizeof(cfb->i2c_adapter.name));
+       cfb->i2c_adapter.owner = THIS_MODULE;
+       cfb->i2c_adapter.algo_data = &cfb->i2c_algo;
+       cfb->i2c_adapter.dev.parent = cfb->fb.device;
+       cfb->i2c_algo.setsda = cyber2000fb_i2c_setsda;
+       cfb->i2c_algo.setscl = cyber2000fb_i2c_setscl;
+       cfb->i2c_algo.getsda = cyber2000fb_i2c_getsda;
+       cfb->i2c_algo.getscl = cyber2000fb_i2c_getscl;
+       cfb->i2c_algo.udelay = 5;
+       cfb->i2c_algo.timeout = msecs_to_jiffies(100);
+       cfb->i2c_algo.data = cfb;
+
+       return i2c_bit_add_bus(&cfb->i2c_adapter);
+}
+
+static void cyber2000fb_i2c_unregister(struct cfb_info *cfb)
+{
+       i2c_del_adapter(&cfb->i2c_adapter);
+}
+#else
+#define cyber2000fb_i2c_register(cfb)  (0)
+#define cyber2000fb_i2c_unregister(cfb)        do { } while (0)
+#endif
+
 /*
  * These parameters give
  * 640x480, hsync 31.5kHz, vsync 60Hz
@@ -1272,6 +1467,8 @@ static struct cfb_info __devinit *cyberpro_alloc_fb_info(unsigned int id,
        cfb->fb.flags           = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
        cfb->fb.pseudo_palette  = cfb->pseudo_palette;
 
+       spin_lock_init(&cfb->reg_b0_lock);
+
        fb_alloc_cmap(&cfb->fb.cmap, NR_PALETTE, 0);
 
        return cfb;
@@ -1366,6 +1563,11 @@ static int __devinit cyberpro_common_probe(struct cfb_info *cfb)
        cfb->fb.fix.mmio_len   = MMIO_SIZE;
        cfb->fb.screen_base    = cfb->region;
 
+#ifdef CONFIG_FB_CYBER2000_DDC
+       if (cyber2000fb_setup_ddc_bus(cfb) == 0)
+               cfb->ddc_registered = true;
+#endif
+
        err = -EINVAL;
        if (!fb_find_mode(&cfb->fb.var, &cfb->fb, NULL, NULL, 0,
                          &cyber2000fb_default_mode, 8)) {
@@ -1398,14 +1600,32 @@ static int __devinit cyberpro_common_probe(struct cfb_info *cfb)
                cfb->fb.var.xres, cfb->fb.var.yres,
                h_sync / 1000, h_sync % 1000, v_sync);
 
-       if (cfb->dev)
-               cfb->fb.device = &cfb->dev->dev;
+       err = cyber2000fb_i2c_register(cfb);
+       if (err)
+               goto failed;
+
        err = register_framebuffer(&cfb->fb);
+       if (err)
+               cyber2000fb_i2c_unregister(cfb);
 
 failed:
+#ifdef CONFIG_FB_CYBER2000_DDC
+       if (err && cfb->ddc_registered)
+               i2c_del_adapter(&cfb->ddc_adapter);
+#endif
        return err;
 }
 
+static void __devexit cyberpro_common_remove(struct cfb_info *cfb)
+{
+       unregister_framebuffer(&cfb->fb);
+#ifdef CONFIG_FB_CYBER2000_DDC
+       if (cfb->ddc_registered)
+               i2c_del_adapter(&cfb->ddc_adapter);
+#endif
+       cyber2000fb_i2c_unregister(cfb);
+}
+
 static void cyberpro_common_resume(struct cfb_info *cfb)
 {
        cyberpro_init_hw(cfb);
@@ -1425,7 +1645,7 @@ static void cyberpro_common_resume(struct cfb_info *cfb)
 
 #ifdef CONFIG_ARCH_SHARK
 
-#include <mach/hardware.h>
+#include <mach/framebuffer.h>
 
 static int __devinit cyberpro_vl_probe(void)
 {
@@ -1439,12 +1659,13 @@ static int __devinit cyberpro_vl_probe(void)
        if (!cfb)
                goto failed_release;
 
-       cfb->dev = NULL;
+       cfb->irq = -1;
        cfb->region = ioremap(FB_START, FB_SIZE);
        if (!cfb->region)
                goto failed_ioremap;
 
        cfb->regs = cfb->region + MMIO_OFFSET;
+       cfb->fb.device = NULL;
        cfb->fb.fix.mmio_start = FB_START + MMIO_OFFSET;
        cfb->fb.fix.smem_start = FB_START;
 
@@ -1513,7 +1734,7 @@ static int cyberpro_pci_enable_mmio(struct cfb_info *cfb)
 
        iop = ioremap(0x3000000, 0x5000);
        if (iop == NULL) {
-               prom_printf("iga5000: cannot map I/O\n");
+               printk(KERN_ERR "iga5000: cannot map I/O\n");
                return -ENOMEM;
        }
 
@@ -1573,22 +1794,22 @@ cyberpro_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
        if (err)
                return err;
 
-       err = pci_request_regions(dev, name);
-       if (err)
-               return err;
-
        err = -ENOMEM;
        cfb = cyberpro_alloc_fb_info(id->driver_data, name);
        if (!cfb)
                goto failed_release;
 
-       cfb->dev = dev;
-       cfb->region = ioremap(pci_resource_start(dev, 0),
-                             pci_resource_len(dev, 0));
+       err = pci_request_regions(dev, cfb->fb.fix.id);
+       if (err)
+               goto failed_regions;
+
+       cfb->irq = dev->irq;
+       cfb->region = pci_ioremap_bar(dev, 0);
        if (!cfb->region)
                goto failed_ioremap;
 
        cfb->regs = cfb->region + MMIO_OFFSET;
+       cfb->fb.device = &dev->dev;
        cfb->fb.fix.mmio_start = pci_resource_start(dev, 0) + MMIO_OFFSET;
        cfb->fb.fix.smem_start = pci_resource_start(dev, 0);
 
@@ -1634,10 +1855,10 @@ cyberpro_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 failed:
        iounmap(cfb->region);
 failed_ioremap:
+       pci_release_regions(dev);
+failed_regions:
        cyberpro_free_fb_info(cfb);
 failed_release:
-       pci_release_regions(dev);
-
        return err;
 }
 
@@ -1646,15 +1867,7 @@ static void __devexit cyberpro_pci_remove(struct pci_dev *dev)
        struct cfb_info *cfb = pci_get_drvdata(dev);
 
        if (cfb) {
-               /*
-                * If unregister_framebuffer fails, then
-                * we will be leaving hooks that could cause
-                * oopsen laying around.
-                */
-               if (unregister_framebuffer(&cfb->fb))
-                       printk(KERN_WARNING "%s: danger Will Robinson, "
-                               "danger danger!  Oopsen imminent!\n",
-                               cfb->fb.fix.id);
+               cyberpro_common_remove(cfb);
                iounmap(cfb->region);
                cyberpro_free_fb_info(cfb);
 
@@ -1737,10 +1950,8 @@ static int __init cyber2000fb_init(void)
 
 #ifdef CONFIG_ARCH_SHARK
        err = cyberpro_vl_probe();
-       if (!err) {
+       if (!err)
                ret = 0;
-               __module_get(THIS_MODULE);
-       }
 #endif
 #ifdef CONFIG_PCI
        err = pci_register_driver(&cyberpro_driver);
@@ -1750,14 +1961,15 @@ static int __init cyber2000fb_init(void)
 
        return ret ? err : 0;
 }
+module_init(cyber2000fb_init);
 
+#ifndef CONFIG_ARCH_SHARK
 static void __exit cyberpro_exit(void)
 {
        pci_unregister_driver(&cyberpro_driver);
 }
-
-module_init(cyber2000fb_init);
 module_exit(cyberpro_exit);
+#endif
 
 MODULE_AUTHOR("Russell King");
 MODULE_DESCRIPTION("CyberPro 2000, 2010 and 5000 framebuffer driver");