diff options
Diffstat (limited to 'drivers/usb/musb/musb_debugfs.c')
| -rw-r--r-- | drivers/usb/musb/musb_debugfs.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c new file mode 100644 index 000000000..0c6204add --- /dev/null +++ b/drivers/usb/musb/musb_debugfs.c @@ -0,0 +1,341 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * MUSB OTG driver debugfs support + * + * Copyright 2010 Nokia Corporation + * Contact: Felipe Balbi <felipe.balbi@nokia.com> + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> + +#include <linux/uaccess.h> + +#include "musb_core.h" +#include "musb_debug.h" + +struct musb_register_map { + char *name; + unsigned offset; + unsigned size; +}; + +static const struct musb_register_map musb_regmap[] = { + { "FAddr", MUSB_FADDR, 8 }, + { "Power", MUSB_POWER, 8 }, + { "Frame", MUSB_FRAME, 16 }, + { "Index", MUSB_INDEX, 8 }, + { "Testmode", MUSB_TESTMODE, 8 }, + { "TxMaxPp", MUSB_TXMAXP, 16 }, + { "TxCSRp", MUSB_TXCSR, 16 }, + { "RxMaxPp", MUSB_RXMAXP, 16 }, + { "RxCSR", MUSB_RXCSR, 16 }, + { "RxCount", MUSB_RXCOUNT, 16 }, + { "IntrRxE", MUSB_INTRRXE, 16 }, + { "IntrTxE", MUSB_INTRTXE, 16 }, + { "IntrUsbE", MUSB_INTRUSBE, 8 }, + { "DevCtl", MUSB_DEVCTL, 8 }, + { "VControl", 0x68, 32 }, + { "HWVers", 0x69, 16 }, + { "LinkInfo", MUSB_LINKINFO, 8 }, + { "VPLen", MUSB_VPLEN, 8 }, + { "HS_EOF1", MUSB_HS_EOF1, 8 }, + { "FS_EOF1", MUSB_FS_EOF1, 8 }, + { "LS_EOF1", MUSB_LS_EOF1, 8 }, + { "SOFT_RST", 0x7F, 8 }, + { "DMA_CNTLch0", 0x204, 16 }, + { "DMA_ADDRch0", 0x208, 32 }, + { "DMA_COUNTch0", 0x20C, 32 }, + { "DMA_CNTLch1", 0x214, 16 }, + { "DMA_ADDRch1", 0x218, 32 }, + { "DMA_COUNTch1", 0x21C, 32 }, + { "DMA_CNTLch2", 0x224, 16 }, + { "DMA_ADDRch2", 0x228, 32 }, + { "DMA_COUNTch2", 0x22C, 32 }, + { "DMA_CNTLch3", 0x234, 16 }, + { "DMA_ADDRch3", 0x238, 32 }, + { "DMA_COUNTch3", 0x23C, 32 }, + { "DMA_CNTLch4", 0x244, 16 }, + { "DMA_ADDRch4", 0x248, 32 }, + { "DMA_COUNTch4", 0x24C, 32 }, + { "DMA_CNTLch5", 0x254, 16 }, + { "DMA_ADDRch5", 0x258, 32 }, + { "DMA_COUNTch5", 0x25C, 32 }, + { "DMA_CNTLch6", 0x264, 16 }, + { "DMA_ADDRch6", 0x268, 32 }, + { "DMA_COUNTch6", 0x26C, 32 }, + { "DMA_CNTLch7", 0x274, 16 }, + { "DMA_ADDRch7", 0x278, 32 }, + { "DMA_COUNTch7", 0x27C, 32 }, + { "ConfigData", MUSB_CONFIGDATA,8 }, + { "BabbleCtl", MUSB_BABBLE_CTL,8 }, + { "TxFIFOsz", MUSB_TXFIFOSZ, 8 }, + { "RxFIFOsz", MUSB_RXFIFOSZ, 8 }, + { "TxFIFOadd", MUSB_TXFIFOADD, 16 }, + { "RxFIFOadd", MUSB_RXFIFOADD, 16 }, + { "EPInfo", MUSB_EPINFO, 8 }, + { "RAMInfo", MUSB_RAMINFO, 8 }, + { } /* Terminating Entry */ +}; + +static int musb_regdump_show(struct seq_file *s, void *unused) +{ + struct musb *musb = s->private; + unsigned i; + + seq_printf(s, "MUSB (M)HDRC Register Dump\n"); + pm_runtime_get_sync(musb->controller); + + for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) { + switch (musb_regmap[i].size) { + case 8: + seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name, + musb_readb(musb->mregs, musb_regmap[i].offset)); + break; + case 16: + seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name, + musb_readw(musb->mregs, musb_regmap[i].offset)); + break; + case 32: + seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name, + musb_readl(musb->mregs, musb_regmap[i].offset)); + break; + } + } + + pm_runtime_mark_last_busy(musb->controller); + pm_runtime_put_autosuspend(musb->controller); + return 0; +} +DEFINE_SHOW_ATTRIBUTE(musb_regdump); + +static int musb_test_mode_show(struct seq_file *s, void *unused) +{ + struct musb *musb = s->private; + unsigned test; + + pm_runtime_get_sync(musb->controller); + test = musb_readb(musb->mregs, MUSB_TESTMODE); + pm_runtime_mark_last_busy(musb->controller); + pm_runtime_put_autosuspend(musb->controller); + + if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS)) + seq_printf(s, "force host full-speed\n"); + + else if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS)) + seq_printf(s, "force host high-speed\n"); + + else if (test == MUSB_TEST_FORCE_HOST) + seq_printf(s, "force host\n"); + + else if (test == MUSB_TEST_FIFO_ACCESS) + seq_printf(s, "fifo access\n"); + + else if (test == MUSB_TEST_FORCE_FS) + seq_printf(s, "force full-speed\n"); + + else if (test == MUSB_TEST_FORCE_HS) + seq_printf(s, "force high-speed\n"); + + else if (test == MUSB_TEST_PACKET) + seq_printf(s, "test packet\n"); + + else if (test == MUSB_TEST_K) + seq_printf(s, "test K\n"); + + else if (test == MUSB_TEST_J) + seq_printf(s, "test J\n"); + + else if (test == MUSB_TEST_SE0_NAK) + seq_printf(s, "test SE0 NAK\n"); + + return 0; +} + +static int musb_test_mode_open(struct inode *inode, struct file *file) +{ + return single_open(file, musb_test_mode_show, inode->i_private); +} + +static ssize_t musb_test_mode_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct musb *musb = s->private; + u8 test; + char buf[24]; + + memset(buf, 0x00, sizeof(buf)); + + if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + pm_runtime_get_sync(musb->controller); + test = musb_readb(musb->mregs, MUSB_TESTMODE); + if (test) { + dev_err(musb->controller, "Error: test mode is already set. " + "Please do USB Bus Reset to start a new test.\n"); + goto ret; + } + + if (strstarts(buf, "force host full-speed")) + test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS; + + else if (strstarts(buf, "force host high-speed")) + test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS; + + else if (strstarts(buf, "force host")) + test = MUSB_TEST_FORCE_HOST; + + else if (strstarts(buf, "fifo access")) + test = MUSB_TEST_FIFO_ACCESS; + + else if (strstarts(buf, "force full-speed")) + test = MUSB_TEST_FORCE_FS; + + else if (strstarts(buf, "force high-speed")) + test = MUSB_TEST_FORCE_HS; + + else if (strstarts(buf, "test packet")) { + test = MUSB_TEST_PACKET; + musb_load_testpacket(musb); + } + + else if (strstarts(buf, "test K")) + test = MUSB_TEST_K; + + else if (strstarts(buf, "test J")) + test = MUSB_TEST_J; + + else if (strstarts(buf, "test SE0 NAK")) + test = MUSB_TEST_SE0_NAK; + + musb_writeb(musb->mregs, MUSB_TESTMODE, test); + +ret: + pm_runtime_mark_last_busy(musb->controller); + pm_runtime_put_autosuspend(musb->controller); + return count; +} + +static const struct file_operations musb_test_mode_fops = { + .open = musb_test_mode_open, + .write = musb_test_mode_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int musb_softconnect_show(struct seq_file *s, void *unused) +{ + struct musb *musb = s->private; + u8 reg; + int connect; + + switch (musb->xceiv->otg->state) { + case OTG_STATE_A_HOST: + case OTG_STATE_A_WAIT_BCON: + pm_runtime_get_sync(musb->controller); + + reg = musb_readb(musb->mregs, MUSB_DEVCTL); + connect = reg & MUSB_DEVCTL_SESSION ? 1 : 0; + + pm_runtime_mark_last_busy(musb->controller); + pm_runtime_put_autosuspend(musb->controller); + break; + default: + connect = -1; + } + + seq_printf(s, "%d\n", connect); + + return 0; +} + +static int musb_softconnect_open(struct inode *inode, struct file *file) +{ + return single_open(file, musb_softconnect_show, inode->i_private); +} + +static ssize_t musb_softconnect_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct musb *musb = s->private; + char buf[2]; + u8 reg; + + memset(buf, 0x00, sizeof(buf)); + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + pm_runtime_get_sync(musb->controller); + if (!strncmp(buf, "0", 1)) { + switch (musb->xceiv->otg->state) { + case OTG_STATE_A_HOST: + musb_root_disconnect(musb); + reg = musb_readb(musb->mregs, MUSB_DEVCTL); + reg &= ~MUSB_DEVCTL_SESSION; + musb_writeb(musb->mregs, MUSB_DEVCTL, reg); + break; + default: + break; + } + } else if (!strncmp(buf, "1", 1)) { + switch (musb->xceiv->otg->state) { + case OTG_STATE_A_WAIT_BCON: + /* + * musb_save_context() called in musb_runtime_suspend() + * might cache devctl with SESSION bit cleared during + * soft-disconnect, so specifically set SESSION bit + * here to preserve it for musb_runtime_resume(). + */ + musb->context.devctl |= MUSB_DEVCTL_SESSION; + reg = musb_readb(musb->mregs, MUSB_DEVCTL); + reg |= MUSB_DEVCTL_SESSION; + musb_writeb(musb->mregs, MUSB_DEVCTL, reg); + break; + default: + break; + } + } + + pm_runtime_mark_last_busy(musb->controller); + pm_runtime_put_autosuspend(musb->controller); + return count; +} + +/* + * In host mode, connect/disconnect the bus without physically + * remove the devices. + */ +static const struct file_operations musb_softconnect_fops = { + .open = musb_softconnect_open, + .write = musb_softconnect_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +void musb_init_debugfs(struct musb *musb) +{ + struct dentry *root; + + root = debugfs_create_dir(dev_name(musb->controller), NULL); + musb->debugfs_root = root; + + debugfs_create_file("regdump", S_IRUGO, root, musb, &musb_regdump_fops); + debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, musb, + &musb_test_mode_fops); + debugfs_create_file("softconnect", S_IRUGO | S_IWUSR, root, musb, + &musb_softconnect_fops); +} + +void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) +{ + debugfs_remove_recursive(musb->debugfs_root); +} |