gumstix-kernel : Add files to build a kernel for gumstix machines. These are

                 copied verbatim from the gumstix OE based build system.

1 files changed, 309 insertions, 0 deletions

diff --git a/packages/linux/gumstix-kernel-2.6.21/ucb1400-ac97-audio.patch b/packages/linux/gumstix-kernel-2.6.21/ucb1400-ac97-audio.patch
new file mode 100644
index 0000000000..eb40bd714a
--- /dev/null
+++ b/packages/linux/gumstix-kernel-2.6.21/ucb1400-ac97-audio.patch
@@ -0,0 +1,309 @@
+Index: linux-2.6.21gum/sound/pci/ac97/ac97_codec.c
+===================================================================
+--- linux-2.6.21gum.orig/sound/pci/ac97/ac97_codec.c
++++ linux-2.6.21gum/sound/pci/ac97/ac97_codec.c
+@@ -158,7 +158,7 @@ static const struct ac97_codec_id snd_ac
+ { 0x4e534300, 0xffffffff, "LM4540,43,45,46,48",	NULL,		NULL }, // only guess --jk
+ { 0x4e534331, 0xffffffff, "LM4549",		NULL,		NULL },
+ { 0x4e534350, 0xffffffff, "LM4550",		patch_lm4550,  	NULL }, // volume wrap fix 
+-{ 0x50534304, 0xffffffff, "UCB1400",		patch_ucb1400,	NULL },
++{ 0x50534304, 0xffffffff, "UCB1400",		patch_ucb1400,	NULL, AC97_HAS_NO_STD_PCM },
+ { 0x53494c20, 0xffffffe0, "Si3036,8",		mpatch_si3036,	mpatch_si3036, AC97_MODEM_PATCH },
+ { 0x54524102, 0xffffffff, "TR28022",		NULL,		NULL },
+ { 0x54524106, 0xffffffff, "TR28026",		NULL,		NULL },
+Index: linux-2.6.21gum/sound/pci/ac97/ac97_patch.c
+===================================================================
+--- linux-2.6.21gum.orig/sound/pci/ac97/ac97_patch.c
++++ linux-2.6.21gum/sound/pci/ac97/ac97_patch.c
+@@ -29,6 +29,10 @@
+ #include <linux/slab.h>
+ #include <linux/mutex.h>
+ 
++#include <linux/proc_fs.h>
++#include <linux/string.h>
++#include <linux/ctype.h>
++
+ #include <sound/core.h>
+ #include <sound/pcm.h>
+ #include <sound/control.h>
+@@ -406,6 +410,238 @@
+ }
+ 
+ /*
++ * UCB1400 codec
++ */
++
++#define AC97_UCB1400_FCSR1     0x6a
++#define AC97_UCB1400_FCSR2     0x6c
++
++static const struct snd_kcontrol_new ucb1400_snd_ac97_controls[] = {
++       AC97_SINGLE("Tone Control - Bass", AC97_UCB1400_FCSR1, 11, 4, 0),
++       AC97_SINGLE("Tone Control - Treble", AC97_UCB1400_FCSR1, 9, 2, 0),
++       AC97_SINGLE("Headphone Playback Switch", AC97_UCB1400_FCSR1, 6, 1, 0),
++       AC97_SINGLE("De-emphasis", AC97_UCB1400_FCSR1, 5, 1, 0),
++       AC97_SINGLE("DC Filter", AC97_UCB1400_FCSR1, 4, 1, 0),
++       AC97_SINGLE("Hi-pass Filter", AC97_UCB1400_FCSR1, 3, 1, 0),
++       AC97_SINGLE("ADC Filter", AC97_UCB1400_FCSR2, 12, 1, 0),
++};
++
++#define NUM_GPIO_LINES 10
++
++static struct proc_dir_entry *proc_gpio_parent;
++static struct proc_dir_entry *proc_gpios[NUM_GPIO_LINES];
++
++typedef struct
++{
++       int                     gpio;
++       char                    name[32];
++       struct snd_ac97         *ac97;
++} gpio_summary_type;
++
++static gpio_summary_type gpio_summaries[NUM_GPIO_LINES] =
++{
++       { 0,    "UCB1400-0-0" },
++       { 1,    "UCB1400-0-1" },
++       { 2,    "UCB1400-0-2" },
++       { 3,    "UCB1400-0-3" },
++       { 4,    "UCB1400-0-4" },
++       { 5,    "UCB1400-0-5" },
++       { 6,    "UCB1400-0-6" },
++       { 7,    "UCB1400-0-7" },
++       { 8,    "UCB1400-0-8" },
++       { 9,    "UCB1400-0-9" }
++};
++
++
++static int proc_ucb1400_ac97_gpio_write(struct file *file, const char __user *buf,
++                        unsigned long count, void *data)
++{
++    char *cur, lbuf[count + 1];
++    gpio_summary_type *summary = data;
++    u32 direction_is_out, operation_is_set;
++    int i = summary->gpio;
++    u16 dir, value;
++
++    if (!capable(CAP_SYS_ADMIN))
++            return -EACCES;
++
++    memset(lbuf, 0, count + 1);
++
++    if (copy_from_user(lbuf, buf, count))
++            return -EFAULT;
++
++    cur = lbuf;
++
++    // Get current values
++    direction_is_out = !!(snd_ac97_read(summary->ac97, 0x5c) & (0x0001 << i));
++    operation_is_set = !!(snd_ac97_read(summary->ac97, 0x5a) & (0x0001 << i));
++    while(1)
++    {
++            // We accept options: {GPIO|AF1|AF2|AF3}, {set|clear}, {in|out}
++            // Anything else is an error
++            while(cur[0] && (isspace(cur[0]) || ispunct(cur[0]))) cur = &(cur[1]);
++
++            if('\0' == cur[0]) break;
++
++            // Ok, so now we're pointing at the start of something
++            switch(cur[0])
++            {
++                    case 'G':
++                            // Check that next is "PIO" -- '\0' will cause safe short-circuit if end of buf
++                            if(!(cur[1] == 'P' && cur[2] == 'I' && cur[3] == 'O')) goto parse_error;
++                            cur = &(cur[4]);
++                            break;
++                    case 's':
++                            if(!(cur[1] == 'e' && cur[2] == 't')) goto parse_error;
++                            operation_is_set = 1;
++                            cur = &(cur[3]);
++                            break;
++                    case 'c':
++                            if(!(cur[1] == 'l' && cur[2] == 'e' && cur[3] == 'a' && cur[4] == 'r')) goto
++parse_error;
++                            operation_is_set = 0;
++                            cur = &(cur[5]);
++                            break;
++                    case 'i':
++                            if(!(cur[1] == 'n')) goto parse_error;
++                            direction_is_out = 0;
++                            cur = &(cur[2]);
++                            break;
++                    case 'o':
++                            if(!(cur[1] == 'u' && cur[2] == 't')) goto parse_error;
++                            direction_is_out = 1;
++                            cur = &(cur[3]);
++                            break;
++                    default: goto parse_error;
++            }
++    }
++    
++    // set/get value
++    dir = snd_ac97_read(summary->ac97, 0x5c);
++    value = snd_ac97_read(summary->ac97, 0x5a);
++    if (direction_is_out)
++    {
++            dir |= 0x0001 << i;
++            if (operation_is_set)
++            {
++                    value |= 0x0001 << i;
++            }
++            else
++            {
++                    value &= ~(0x0001 << i);
++            }
++
++            snd_ac97_write(summary->ac97, 0x5c, dir);
++            snd_ac97_write(summary->ac97, 0x5a, value);
++    }
++    else // direction in
++    {
++            dir &= ~(0x0001 << i);
++            snd_ac97_write(summary->ac97, 0x5c, dir);
++            operation_is_set = snd_ac97_read(summary->ac97, 0x5a) & ~(0x0001 << i);
++    }
++
++#ifdef CONFIG_PROC_GPIO_DEBUG
++    printk(KERN_INFO "Set (%s,%s,%s) via /proc/gpio/%s\n",
++                            "GPIO",
++                            direction_is_out ? "out" : "in",
++                            operation_is_set ? "set" : "clear",
++                            summary->name);
++#endif
++
++    return count;
++
++parse_error:
++    printk(KERN_CRIT "Parse error: Expect \"GPIO|[set|clear]|[in|out] ...\"\n");
++    return -EINVAL;
++}
++
++static int proc_ucb1400_ac97_gpio_read(char *page, char **start, off_t off,
++                    int count, int *eof, void *data)
++{
++    char *p = page;
++    gpio_summary_type *summary = data;
++    int len, i; /*, af;*/
++    i = summary->gpio;
++
++    p += sprintf(p, "%d\t%s\t%s\t%s\n", i,
++                    "GPIO",
++                    (snd_ac97_read(summary->ac97, 0x5c) & (0x0001 << i)) ? "out" : "in",
++                    (snd_ac97_read(summary->ac97, 0x5a) & (0x0001 << i)) ? "set" : "clear");
++    
++    len = (p - page) - off;
++
++    if(len < 0)
++    {
++            len = 0;
++    }
++
++    *eof = (len <= count) ? 1 : 0;
++    *start = page + off;
++
++    return len;
++}
++
++int patch_ucb1400(struct snd_ac97 * ac97)
++{
++       int err, i;
++
++  proc_gpio_parent = NULL;
++  for (proc_gpio_parent = proc_root.subdir; proc_gpio_parent; proc_gpio_parent = proc_gpio_parent->next) {
++    if (( proc_gpio_parent->namelen == 4 ) && ( memcmp(proc_gpio_parent->name, "gpio", 4 ) == 0 ))
++      break;
++  }
++
++  // proc_gpio_parent will be non-NULL if the directory already exists
++
++  if (!proc_gpio_parent) {
++       proc_gpio_parent = proc_mkdir("gpio", NULL);
++  }
++
++       if(!proc_gpio_parent) return 0;
++ 
++       for(i=0; i < NUM_GPIO_LINES; i++)
++       {
++               proc_gpios[i] = create_proc_entry(gpio_summaries[i].name, 0644, proc_gpio_parent);
++               if(proc_gpios[i])
++               {
++                       gpio_summaries[i].ac97 = ac97;
++                       proc_gpios[i]->data = &gpio_summaries[i];
++                       proc_gpios[i]->read_proc = proc_ucb1400_ac97_gpio_read;
++                       proc_gpios[i]->write_proc = proc_ucb1400_ac97_gpio_write;
++               }
++       }
++
++       for(i = 0; i < ARRAY_SIZE(ucb1400_snd_ac97_controls); i++) {
++               if((err = snd_ctl_add(ac97->bus->card, snd_ac97_cnew(&ucb1400_snd_ac97_controls[i], ac97))) < 0)
++                       return err;
++       }
++
++       snd_ac97_write_cache(ac97,  AC97_UCB1400_FCSR1,
++                       (0 << 11) |     // 0 base boost
++                       (0 << 9)  |     // 0 treble boost
++                       (0 << 7)  |     // Mode = flat
++                       (1 << 6)  |     // Headphones enable
++                       (0 << 5)  |     // De-emphasis disabled
++                       (1 << 4)  |     // DC filter enabled
++                       (1 << 3)  |     // Hi-pass filter enabled
++                       (0 << 2)  |     // disable interrupt signalling via GPIO_INT
++                       (1 << 0)        // clear ADC overflow status if set
++               );
++
++       snd_ac97_write_cache(ac97, AC97_UCB1400_FCSR2,
++                       (0 << 15) |     // must be 0
++                       (0 << 13) |     // must be 0
++                       (1 << 12) |     // ADC filter enabled
++                       (0 << 10) |     // must be 0
++                       (0 << 4)  |     // Smart low power mode on neither Codec nor PLL
++                       (0 << 0)        // must be 0
++               );
++
++       return 0;
++}
++
++/*
+  * May 2, 2003 Liam Girdwood <liam.girdwood@wolfsonmicro.com>
+  *  removed broken wolfson00 patch.
+  *  added support for WM9705,WM9708,WM9709,WM9710,WM9711,WM9712 and WM9717.
+@@ -3408,41 +3644,3 @@
+ 	ac97->res_table = lm4550_restbl;
+ 	return 0;
+ }
+-
+-/* 
+- *  UCB1400 codec (http://www.semiconductors.philips.com/acrobat_download/datasheets/UCB1400-02.pdf)
+- */
+-static const struct snd_kcontrol_new snd_ac97_controls_ucb1400[] = {
+-/* enable/disable headphone driver which allows direct connection to
+-   stereo headphone without the use of external DC blocking
+-   capacitors */
+-AC97_SINGLE("Headphone Driver", 0x6a, 6, 1, 0),
+-/* Filter used to compensate the DC offset is added in the ADC to remove idle
+-   tones from the audio band. */
+-AC97_SINGLE("DC Filter", 0x6a, 4, 1, 0),
+-/* Control smart-low-power mode feature. Allows automatic power down
+-   of unused blocks in the ADC analog front end and the PLL. */
+-AC97_SINGLE("Smart Low Power Mode", 0x6c, 4, 3, 0),
+-};
+-
+-static int patch_ucb1400_specific(struct snd_ac97 * ac97)
+-{
+-	int idx, err;
+-	for (idx = 0; idx < ARRAY_SIZE(snd_ac97_controls_ucb1400); idx++)
+-		if ((err = snd_ctl_add(ac97->bus->card, snd_ctl_new1(&snd_ac97_controls_ucb1400[idx], ac97))) < 0)
+-			return err;
+-	return 0;
+-}
+-
+-static struct snd_ac97_build_ops patch_ucb1400_ops = {
+-	.build_specific	= patch_ucb1400_specific,
+-};
+-
+-int patch_ucb1400(struct snd_ac97 * ac97)
+-{
+-	ac97->build_ops = &patch_ucb1400_ops;
+-	/* enable headphone driver and smart low power mode by default */
+-	snd_ac97_write(ac97, 0x6a, 0x0050);
+-	snd_ac97_write(ac97, 0x6c, 0x0030);
+-	return 0;
+-}