diff options
author | Alek Du <alek.du@intel.com> | 2010-06-04 15:47:54 +0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 14:35:35 -0700 |
commit | aa4d8342988d0c1a79ff19b2ede1e81dfbb16ea5 (patch) | |
tree | 7139abaa1f63af9a70405cec91dcd1b8a30bf0d0 /drivers/usb/host/ehci-dbg.c | |
parent | e644814a2ccbfe171d2fd2b9bca491ead1ae1a96 (diff) |
USB: EHCI: EHCI 1.1 addendum: preparation
EHCI 1.1 addendum introduced several energy efficiency extensions for
EHCI USB host controllers:
1. LPM (link power management)
2. Per-port change
3. Shorter periodic frame list
4. Hardware prefetching
This patch is intended to define the HW bits and debug interface for
EHCI 1.1 addendum. The LPM and Per-port change patches will be sent out
after this patch.
Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-dbg.c')
-rw-r--r-- | drivers/usb/host/ehci-dbg.c | 144 |
1 files changed, 137 insertions, 7 deletions
diff --git a/drivers/usb/host/ehci-dbg.c b/drivers/usb/host/ehci-dbg.c index 874d2000bf9..df5546bb836 100644 --- a/drivers/usb/host/ehci-dbg.c +++ b/drivers/usb/host/ehci-dbg.c @@ -98,13 +98,18 @@ static void dbg_hcc_params (struct ehci_hcd *ehci, char *label) HCC_64BIT_ADDR(params) ? " 64 bit addr" : ""); } else { ehci_dbg (ehci, - "%s hcc_params %04x thresh %d uframes %s%s%s\n", + "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n", label, params, HCC_ISOC_THRES(params), HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", HCC_CANPARK(params) ? " park" : "", - HCC_64BIT_ADDR(params) ? " 64 bit addr" : ""); + HCC_64BIT_ADDR(params) ? " 64 bit addr" : "", + HCC_LPM(params) ? " LPM" : "", + HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "", + HCC_HW_PREFETCH(params) ? " hw prefetch" : "", + HCC_32FRAME_PERIODIC_LIST(params) ? + " 32 peridic list" : ""); } } #else @@ -191,8 +196,9 @@ static int __maybe_unused dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) { return scnprintf (buf, len, - "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s", + "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s", label, label [0] ? " " : "", status, + (status & STS_PPCE_MASK) ? " PPCE" : "", (status & STS_ASS) ? " Async" : "", (status & STS_PSS) ? " Periodic" : "", (status & STS_RECL) ? " Recl" : "", @@ -210,8 +216,9 @@ static int __maybe_unused dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) { return scnprintf (buf, len, - "%s%sintrenable %02x%s%s%s%s%s%s", + "%s%sintrenable %02x%s%s%s%s%s%s%s", label, label [0] ? " " : "", enable, + (enable & STS_PPCE_MASK) ? " PPCE" : "", (enable & STS_IAA) ? " IAA" : "", (enable & STS_FATAL) ? " FATAL" : "", (enable & STS_FLR) ? " FLR" : "", @@ -228,9 +235,15 @@ static int dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) { return scnprintf (buf, len, - "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s", + "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s " + "period=%s%s %s", label, label [0] ? " " : "", command, - (command & CMD_PARK) ? "park" : "(park)", + (command & CMD_HIRD) ? " HIRD" : "", + (command & CMD_PPCEE) ? " PPCEE" : "", + (command & CMD_FSP) ? " FSP" : "", + (command & CMD_ASPE) ? " ASPE" : "", + (command & CMD_PSPE) ? " PSPE" : "", + (command & CMD_PARK) ? " park" : "(park)", CMD_PARK_CNT (command), (command >> 16) & 0x3f, (command & CMD_LRESET) ? " LReset" : "", @@ -257,11 +270,22 @@ dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) } return scnprintf (buf, len, - "%s%sport %d status %06x%s%s sig=%s%s%s%s%s%s%s%s%s%s", + "%s%sport:%d status %06x %d %s%s%s%s%s%s " + "sig=%s%s%s%s%s%s%s%s%s%s%s", label, label [0] ? " " : "", port, status, + status>>25,/*device address */ + (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ? + " ACK" : "", + (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ? + " NYET" : "", + (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ? + " STALL" : "", + (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ? + " ERR" : "", (status & PORT_POWER) ? " POWER" : "", (status & PORT_OWNER) ? " OWNER" : "", sig, + (status & PORT_LPM) ? " LPM" : "", (status & PORT_RESET) ? " RESET" : "", (status & PORT_SUSPEND) ? " SUSPEND" : "", (status & PORT_RESUME) ? " RESUME" : "", @@ -330,6 +354,13 @@ static int debug_async_open(struct inode *, struct file *); static int debug_periodic_open(struct inode *, struct file *); static int debug_registers_open(struct inode *, struct file *); static int debug_async_open(struct inode *, struct file *); +static int debug_lpm_open(struct inode *, struct file *); +static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos); +static ssize_t debug_lpm_write(struct file *file, const char __user *buffer, + size_t count, loff_t *ppos); +static int debug_lpm_close(struct inode *inode, struct file *file); + static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); static int debug_close(struct inode *, struct file *); @@ -351,6 +382,13 @@ static const struct file_operations debug_registers_fops = { .read = debug_output, .release = debug_close, }; +static const struct file_operations debug_lpm_fops = { + .owner = THIS_MODULE, + .open = debug_lpm_open, + .read = debug_lpm_read, + .write = debug_lpm_write, + .release = debug_lpm_close, +}; static struct dentry *ehci_debug_root; @@ -917,6 +955,94 @@ static int debug_registers_open(struct inode *inode, struct file *file) return file->private_data ? 0 : -ENOMEM; } +static int debug_lpm_open(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +static int debug_lpm_close(struct inode *inode, struct file *file) +{ + return 0; +} + +static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + /* TODO: show lpm stats */ + return 0; +} + +static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct usb_hcd *hcd; + struct ehci_hcd *ehci; + char buf[50]; + size_t len; + u32 temp; + unsigned long port; + u32 __iomem *portsc ; + u32 params; + + hcd = bus_to_hcd(file->private_data); + ehci = hcd_to_ehci(hcd); + + len = min(count, sizeof(buf) - 1); + if (copy_from_user(buf, user_buf, len)) + return -EFAULT; + buf[len] = '\0'; + if (len > 0 && buf[len - 1] == '\n') + buf[len - 1] = '\0'; + + if (strncmp(buf, "enable", 5) == 0) { + if (strict_strtoul(buf + 7, 10, &port)) + return -EINVAL; + params = ehci_readl(ehci, &ehci->caps->hcs_params); + if (port > HCS_N_PORTS(params)) { + ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port); + return -ENODEV; + } + portsc = &ehci->regs->port_status[port-1]; + temp = ehci_readl(ehci, portsc); + if (!(temp & PORT_DEV_ADDR)) { + ehci_dbg(ehci, "LPM: no device attached\n"); + return -ENODEV; + } + temp |= PORT_LPM; + ehci_writel(ehci, temp, portsc); + printk(KERN_INFO "force enable LPM for port %lu\n", port); + } else if (strncmp(buf, "hird=", 5) == 0) { + unsigned long hird; + if (strict_strtoul(buf + 5, 16, &hird)) + return -EINVAL; + printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird); + temp = ehci_readl(ehci, &ehci->regs->command); + temp &= ~CMD_HIRD; + temp |= hird << 24; + ehci_writel(ehci, temp, &ehci->regs->command); + } else if (strncmp(buf, "disable", 7) == 0) { + if (strict_strtoul(buf + 8, 10, &port)) + return -EINVAL; + params = ehci_readl(ehci, &ehci->caps->hcs_params); + if (port > HCS_N_PORTS(params)) { + ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port); + return -ENODEV; + } + portsc = &ehci->regs->port_status[port-1]; + temp = ehci_readl(ehci, portsc); + if (!(temp & PORT_DEV_ADDR)) { + ehci_dbg(ehci, "ERR: no device attached\n"); + return -ENODEV; + } + temp &= ~PORT_LPM; + ehci_writel(ehci, temp, portsc); + printk(KERN_INFO "disabled LPM for port %lu\n", port); + } else + return -EOPNOTSUPP; + return count; +} + static inline void create_debug_files (struct ehci_hcd *ehci) { struct usb_bus *bus = &ehci_to_hcd(ehci)->self; @@ -940,6 +1066,10 @@ static inline void create_debug_files (struct ehci_hcd *ehci) ehci->debug_registers = debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, &debug_registers_fops); + + ehci->debug_registers = debugfs_create_file("lpm", S_IRUGO|S_IWUGO, + ehci->debug_dir, bus, + &debug_lpm_fops); if (!ehci->debug_registers) goto registers_error; return; |