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grub/bus/usb/ohci.c
Vladimir 'phcoder' Serbinenko 3ee4474e8d Prepare infrastructure for background USB transfers
2010-08-21 16:09:43 +02:00

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/* ohci.c - OHCI Support. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2008 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/dl.h>
#include <grub/mm.h>
#include <grub/usb.h>
#include <grub/usbtrans.h>
#include <grub/misc.h>
#include <grub/pci.h>
#include <grub/cpu/pci.h>
#include <grub/cpu/io.h>
#include <grub/time.h>
#include <grub/cs5536.h>
#include <grub/loader.h>
struct grub_ohci_hcca
{
/* Pointers to Interrupt Endpoint Descriptors. Not used by
GRUB. */
grub_uint32_t inttable[32];
/* Current frame number. */
grub_uint16_t framenumber;
grub_uint16_t pad;
/* List of completed TDs. */
grub_uint32_t donehead;
grub_uint8_t reserved[116];
} __attribute__((packed));
/* OHCI General Transfer Descriptor */
struct grub_ohci_td
{
/* Information used to construct the TOKEN packet. */
grub_uint32_t token;
grub_uint32_t buffer; /* LittleEndian physical address */
grub_uint32_t next_td; /* LittleEndian physical address */
grub_uint32_t buffer_end; /* LittleEndian physical address */
/* next values are not for OHCI HW */
grub_uint32_t prev_td_phys; /* we need it to find previous TD
* physical address in CPU endian */
grub_uint32_t link_td; /* pointer to next free/chained TD
* pointer as uint32 */
grub_uint32_t tr_index; /* index of TD in transfer */
grub_uint8_t pad[4]; /* padding to 32 bytes */
} __attribute__((packed));
/* OHCI Endpoint Descriptor. */
struct grub_ohci_ed
{
grub_uint32_t target;
grub_uint32_t td_tail;
grub_uint32_t td_head;
grub_uint32_t next_ed;
} __attribute__((packed));
typedef volatile struct grub_ohci_td *grub_ohci_td_t;
typedef volatile struct grub_ohci_ed *grub_ohci_ed_t;
/* Experimental change of ED/TD allocation */
/* Little bit similar as in UHCI */
/* Implementation assumes:
* 32-bits architecture - XXX: fix for 64-bits
* memory allocated by grub_memalign_dma32 must be continuous
* in virtual and also in physical memory */
struct grub_ohci
{
volatile grub_uint32_t *iobase;
volatile struct grub_ohci_hcca *hcca;
grub_uint32_t hcca_addr;
struct grub_pci_dma_chunk *hcca_chunk;
grub_ohci_ed_t ed_ctrl; /* EDs for CONTROL */
grub_uint32_t ed_ctrl_addr;
struct grub_pci_dma_chunk *ed_ctrl_chunk;
grub_ohci_ed_t ed_bulk; /* EDs for BULK */
grub_uint32_t ed_bulk_addr;
struct grub_pci_dma_chunk *ed_bulk_chunk;
grub_ohci_td_t td; /* TDs */
grub_uint32_t td_addr;
struct grub_pci_dma_chunk *td_chunk;
struct grub_ohci *next;
grub_ohci_td_t td_free; /* Pointer to first free TD */
int bad_OHCI;
};
static struct grub_ohci *ohci;
typedef enum
{
GRUB_OHCI_REG_REVISION = 0x00,
GRUB_OHCI_REG_CONTROL,
GRUB_OHCI_REG_CMDSTATUS,
GRUB_OHCI_REG_INTSTATUS,
GRUB_OHCI_REG_INTENA,
GRUB_OHCI_REG_INTDIS,
GRUB_OHCI_REG_HCCA,
GRUB_OHCI_REG_PERIODIC,
GRUB_OHCI_REG_CONTROLHEAD,
GRUB_OHCI_REG_CONTROLCURR,
GRUB_OHCI_REG_BULKHEAD,
GRUB_OHCI_REG_BULKCURR,
GRUB_OHCI_REG_DONEHEAD,
GRUB_OHCI_REG_FRAME_INTERVAL,
GRUB_OHCI_REG_PERIODIC_START = 16,
GRUB_OHCI_REG_RHUBA = 18,
GRUB_OHCI_REG_RHUBPORT = 21,
GRUB_OHCI_REG_LEGACY_CONTROL = 0x100,
GRUB_OHCI_REG_LEGACY_INPUT = 0x104,
GRUB_OHCI_REG_LEGACY_OUTPUT = 0x108,
GRUB_OHCI_REG_LEGACY_STATUS = 0x10c
} grub_ohci_reg_t;
#define GRUB_OHCI_RHUB_PORT_POWER_MASK 0x300
#define GRUB_OHCI_RHUB_PORT_ALL_POWERED 0x200
#define GRUB_OHCI_REG_FRAME_INTERVAL_FSMPS_MASK 0x8fff0000
#define GRUB_OHCI_REG_FRAME_INTERVAL_FSMPS_SHIFT 16
#define GRUB_OHCI_REG_FRAME_INTERVAL_FI_SHIFT 0
/* XXX: Is this choice of timings sane? */
#define GRUB_OHCI_FSMPS 0x2778
#define GRUB_OHCI_PERIODIC_START 0x257f
#define GRUB_OHCI_FRAME_INTERVAL 0x2edf
#define GRUB_OHCI_SET_PORT_ENABLE (1 << 1)
#define GRUB_OHCI_CLEAR_PORT_ENABLE (1 << 0)
#define GRUB_OHCI_SET_PORT_RESET (1 << 4)
#define GRUB_OHCI_SET_PORT_RESET_STATUS_CHANGE (1 << 20)
#define GRUB_OHCI_REG_CONTROL_BULK_ENABLE (1 << 5)
#define GRUB_OHCI_REG_CONTROL_CONTROL_ENABLE (1 << 4)
#define GRUB_OHCI_RESET_CONNECT_CHANGE (1 << 16)
#define GRUB_OHCI_CTRL_EDS 16
#define GRUB_OHCI_BULK_EDS 16
#define GRUB_OHCI_TDS 256
#define GRUB_OHCI_ED_ADDR_MASK 0x7ff
static inline grub_ohci_ed_t
grub_ohci_ed_phys2virt (struct grub_ohci *o, int bulk, grub_uint32_t x)
{
if (!x)
return NULL;
if (bulk)
return (grub_ohci_ed_t) (x - o->ed_bulk_addr
+ (grub_uint8_t *) o->ed_bulk);
return (grub_ohci_ed_t) (x - o->ed_ctrl_addr
+ (grub_uint8_t *) o->ed_ctrl);
}
static grub_uint32_t
grub_ohci_virt_to_phys (struct grub_ohci *o, int bulk, grub_ohci_ed_t x)
{
if (!x)
return 0;
if (bulk)
return (grub_uint8_t *) x - (grub_uint8_t *) o->ed_bulk + o->ed_bulk_addr;
return (grub_uint8_t *) x - (grub_uint8_t *) o->ed_ctrl + o->ed_ctrl_addr;
}
static inline grub_ohci_td_t
grub_ohci_td_phys2virt (struct grub_ohci *o, grub_uint32_t x)
{
if (!x)
return NULL;
return (grub_ohci_td_t) (x - o->td_addr + (grub_uint8_t *) o->td);
}
static grub_uint32_t
grub_ohci_td_virt2phys (struct grub_ohci *o, grub_ohci_td_t x)
{
if (!x)
return 0;
return (grub_uint8_t *)x - (grub_uint8_t *)o->td + o->td_addr;
}
static grub_uint32_t
grub_ohci_readreg32 (struct grub_ohci *o, grub_ohci_reg_t reg)
{
return grub_le_to_cpu32 (*(o->iobase + reg));
}
static void
grub_ohci_writereg32 (struct grub_ohci *o,
grub_ohci_reg_t reg, grub_uint32_t val)
{
*(o->iobase + reg) = grub_cpu_to_le32 (val);
}
/* Iterate over all PCI devices. Determine if a device is an OHCI
controller. If this is the case, initialize it. */
static int NESTED_FUNC_ATTR
grub_ohci_pci_iter (grub_pci_device_t dev,
grub_pci_id_t pciid)
{
grub_uint32_t interf;
grub_uint32_t base;
grub_pci_address_t addr;
struct grub_ohci *o;
grub_uint32_t revision;
int cs5536;
int j;
/* Determine IO base address. */
grub_dprintf ("ohci", "pciid = %x\n", pciid);
if (pciid == GRUB_CS5536_PCIID)
{
grub_uint64_t basereg;
cs5536 = 1;
basereg = grub_cs5536_read_msr (dev, GRUB_CS5536_MSR_USB_OHCI_BASE);
if (!(basereg & GRUB_CS5536_MSR_USB_BASE_MEMORY_ENABLE))
{
/* Shouldn't happen. */
grub_dprintf ("ohci", "No OHCI address is assigned\n");
return 0;
}
base = (basereg & GRUB_CS5536_MSR_USB_BASE_ADDR_MASK);
basereg |= GRUB_CS5536_MSR_USB_BASE_BUS_MASTER;
basereg &= ~GRUB_CS5536_MSR_USB_BASE_PME_ENABLED;
basereg &= ~GRUB_CS5536_MSR_USB_BASE_PME_STATUS;
grub_cs5536_write_msr (dev, GRUB_CS5536_MSR_USB_OHCI_BASE, basereg);
}
else
{
grub_uint32_t class_code;
grub_uint32_t class;
grub_uint32_t subclass;
addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS);
class_code = grub_pci_read (addr) >> 8;
interf = class_code & 0xFF;
subclass = (class_code >> 8) & 0xFF;
class = class_code >> 16;
/* If this is not an OHCI controller, just return. */
if (class != 0x0c || subclass != 0x03 || interf != 0x10)
return 0;
addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG0);
base = grub_pci_read (addr);
#if 0
/* Stop if there is no IO space base address defined. */
if (! (base & 1))
return 0;
#endif
grub_dprintf ("ohci", "class=0x%02x 0x%02x interface 0x%02x\n",
class, subclass, interf);
}
/* Allocate memory for the controller and register it. */
o = grub_malloc (sizeof (*o));
if (! o)
return 1;
grub_memset ((void*)o, 0, sizeof (*o));
o->iobase = grub_pci_device_map_range (dev, base, 0x800);
grub_dprintf ("ohci", "base=%p\n", o->iobase);
/* Reserve memory for the HCCA. */
o->hcca_chunk = grub_memalign_dma32 (256, 256);
if (! o->hcca_chunk)
goto fail;
o->hcca = grub_dma_get_virt (o->hcca_chunk);
o->hcca_addr = grub_dma_get_phys (o->hcca_chunk);
grub_memset ((void*)o->hcca, 0, sizeof(*o->hcca));
grub_dprintf ("ohci", "hcca: chunk=%p, virt=%p, phys=0x%02x\n",
o->hcca_chunk, o->hcca, o->hcca_addr);
/* Reserve memory for ctrl EDs. */
o->ed_ctrl_chunk = grub_memalign_dma32 (16, sizeof(struct grub_ohci_ed)*GRUB_OHCI_CTRL_EDS);
if (! o->ed_ctrl_chunk)
goto fail;
o->ed_ctrl = grub_dma_get_virt (o->ed_ctrl_chunk);
o->ed_ctrl_addr = grub_dma_get_phys (o->ed_ctrl_chunk);
/* Preset EDs */
grub_memset ((void*)o->ed_ctrl, 0, sizeof(struct grub_ohci_ed) * GRUB_OHCI_CTRL_EDS);
for (j=0; j < GRUB_OHCI_CTRL_EDS; j++)
o->ed_ctrl[j].target = grub_cpu_to_le32 (1 << 14); /* skip */
grub_dprintf ("ohci", "EDs-C: chunk=%p, virt=%p, phys=0x%02x\n",
o->ed_ctrl_chunk, o->ed_ctrl, o->ed_ctrl_addr);
/* Reserve memory for bulk EDs. */
o->ed_bulk_chunk = grub_memalign_dma32 (16, sizeof(struct grub_ohci_ed)*GRUB_OHCI_BULK_EDS);
if (! o->ed_bulk_chunk)
goto fail;
o->ed_bulk = grub_dma_get_virt (o->ed_bulk_chunk);
o->ed_bulk_addr = grub_dma_get_phys (o->ed_bulk_chunk);
/* Preset EDs */
grub_memset ((void*)o->ed_bulk, 0, sizeof(struct grub_ohci_ed) * GRUB_OHCI_BULK_EDS);
for (j=0; j < GRUB_OHCI_BULK_EDS; j++)
o->ed_bulk[j].target = grub_cpu_to_le32 (1 << 14); /* skip */
grub_dprintf ("ohci", "EDs-B: chunk=%p, virt=%p, phys=0x%02x\n",
o->ed_bulk_chunk, o->ed_bulk, o->ed_bulk_addr);
/* Reserve memory for TDs. */
o->td_chunk = grub_memalign_dma32 (32, sizeof(struct grub_ohci_td)*GRUB_OHCI_TDS);
/* Why is it aligned on 32 boundary if spec. says 16 ?
* We have structure 32 bytes long and we don't want cross
* 4K boundary inside structure. */
if (! o->td_chunk)
goto fail;
o->td_free = o->td = grub_dma_get_virt (o->td_chunk);
o->td_addr = grub_dma_get_phys (o->td_chunk);
/* Preset free TDs chain in TDs */
grub_memset ((void*)o->td, 0, sizeof(struct grub_ohci_td) * GRUB_OHCI_TDS);
for (j=0; j < (GRUB_OHCI_TDS-1); j++)
o->td[j].link_td = (grub_uint32_t)&o->td[j+1];
grub_dprintf ("ohci", "TDs: chunk=%p, virt=%p, phys=0x%02x\n",
o->td_chunk, o->td, o->td_addr);
/* Check if the OHCI revision is actually 1.0 as supported. */
revision = grub_ohci_readreg32 (o, GRUB_OHCI_REG_REVISION);
grub_dprintf ("ohci", "OHCI revision=0x%02x\n", revision & 0xFF);
if ((revision & 0xFF) != 0x10)
goto fail;
{
grub_uint32_t control;
/* Check SMM/BIOS ownership of OHCI (SMM = USB Legacy Support driver for BIOS) */
control = grub_ohci_readreg32 (o, GRUB_OHCI_REG_CONTROL);
if ((control & 0x100) != 0)
{
unsigned i;
grub_dprintf("ohci", "OHCI is owned by SMM\n");
/* Do change of ownership */
/* Ownership change request */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CMDSTATUS, (1<<3)); /* XXX: Magic. */
/* Waiting for SMM deactivation */
for (i=0; i < 10; i++)
{
if ((grub_ohci_readreg32 (o, GRUB_OHCI_REG_CONTROL) & 0x100) == 0)
{
grub_dprintf("ohci", "Ownership changed normally.\n");
break;
}
grub_millisleep (100);
}
if (i >= 10)
{
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROL,
grub_ohci_readreg32 (o, GRUB_OHCI_REG_CONTROL) & ~0x100);
grub_dprintf("ohci", "Ownership changing timeout, change forced !\n");
}
}
else if (((control & 0x100) == 0) &&
((control & 0xc0) != 0)) /* Not owned by SMM nor reset */
{
grub_dprintf("ohci", "OHCI is owned by BIOS\n");
/* Do change of ownership - not implemented yet... */
/* In fact we probably need to do nothing ...? */
}
else
{
grub_dprintf("ohci", "OHCI is not owned by SMM nor BIOS\n");
/* We can setup OHCI. */
}
}
/* Suspend the OHCI by issuing a reset. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CMDSTATUS, 1); /* XXX: Magic. */
grub_millisleep (1);
grub_dprintf ("ohci", "OHCI reset\n");
grub_ohci_writereg32 (o, GRUB_OHCI_REG_FRAME_INTERVAL,
(GRUB_OHCI_FSMPS
<< GRUB_OHCI_REG_FRAME_INTERVAL_FSMPS_SHIFT)
| (GRUB_OHCI_FRAME_INTERVAL
<< GRUB_OHCI_REG_FRAME_INTERVAL_FI_SHIFT));
grub_ohci_writereg32 (o, GRUB_OHCI_REG_PERIODIC_START,
GRUB_OHCI_PERIODIC_START);
/* Setup the HCCA. */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_HCCA, o->hcca_addr);
grub_dprintf ("ohci", "OHCI HCCA\n");
/* Misc. pre-sets. */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, 0x7f); /* Clears everything */
/* We don't want modify CONTROL/BULK HEAD registers.
* So we assign to HEAD registers zero ED from related array
* and we will not use this ED, it will be always skipped.
* It should not produce notable performance penalty (I hope). */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLHEAD, o->ed_ctrl_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLCURR, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKHEAD, o->ed_bulk_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKCURR, 0);
/* Check OHCI Legacy Support */
if ((revision & 0x100) != 0)
{
grub_dprintf ("ohci", "Legacy Support registers detected\n");
grub_dprintf ("ohci", "Current state of legacy control reg.: 0x%04x\n",
grub_ohci_readreg32 (o, GRUB_OHCI_REG_LEGACY_CONTROL));
grub_ohci_writereg32 (o, GRUB_OHCI_REG_LEGACY_CONTROL,
(grub_ohci_readreg32 (o, GRUB_OHCI_REG_LEGACY_CONTROL)) & ~1);
grub_dprintf ("ohci", "OHCI Legacy Support disabled.\n");
}
/* Enable the OHCI + enable CONTROL and BULK LIST. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROL,
(2 << 6)
| GRUB_OHCI_REG_CONTROL_CONTROL_ENABLE
| GRUB_OHCI_REG_CONTROL_BULK_ENABLE );
grub_dprintf ("ohci", "OHCI enable: 0x%02x\n",
(grub_ohci_readreg32 (o, GRUB_OHCI_REG_CONTROL) >> 6) & 3);
/* Power on all ports */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBA,
(grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBA)
& ~GRUB_OHCI_RHUB_PORT_POWER_MASK)
| GRUB_OHCI_RHUB_PORT_ALL_POWERED);
/* Now we have hot-plugging, we need to wait for stable power only */
grub_millisleep (100);
/* Link to ohci now that initialisation is successful. */
o->next = ohci;
ohci = o;
return 0;
fail:
if (o)
grub_dma_free (o->td_chunk);
grub_dma_free (o->ed_bulk_chunk);
grub_dma_free (o->ed_ctrl_chunk);
grub_dma_free (o->hcca_chunk);
grub_free (o);
return 0;
}
static void
grub_ohci_inithw (void)
{
grub_pci_iterate (grub_ohci_pci_iter);
}
static int
grub_ohci_iterate (int (*hook) (grub_usb_controller_t dev))
{
struct grub_ohci *o;
struct grub_usb_controller dev;
for (o = ohci; o; o = o->next)
{
dev.data = o;
if (hook (&dev))
return 1;
}
return 0;
}
static grub_ohci_ed_t
grub_ohci_find_ed (struct grub_ohci *o, int bulk, grub_uint32_t target)
{
grub_ohci_ed_t ed, ed_next;
grub_uint32_t target_addr = target & GRUB_OHCI_ED_ADDR_MASK;
int count;
int i;
/* Use proper values and structures. */
if (bulk)
{
count = GRUB_OHCI_BULK_EDS;
ed = o->ed_bulk;
ed_next = grub_ohci_ed_phys2virt(o, bulk,
grub_le_to_cpu32 (ed->next_ed) );
}
else
{
count = GRUB_OHCI_CTRL_EDS;
ed = o->ed_ctrl;
ed_next = grub_ohci_ed_phys2virt(o, bulk,
grub_le_to_cpu32 (ed->next_ed) );
}
/* First try to find existing ED with proper target address */
for (i = 0; ; )
{
if (i && /* We ignore zero ED */
((ed->target & GRUB_OHCI_ED_ADDR_MASK) == target_addr))
return ed; /* Found proper existing ED */
i++;
if (ed_next && (i < count))
{
ed = ed_next;
ed_next = grub_ohci_ed_phys2virt(o, bulk,
grub_le_to_cpu32 (ed->next_ed) );
continue;
}
break;
}
/* ED with target_addr does not exist, we have to add it */
/* Have we any free ED in array ? */
if (i >= count) /* No. */
return NULL;
/* Currently we simply take next ED in array, no allocation
* function is used. It should be no problem until hot-plugging
* will be implemented, i.e. until we will need to de-allocate EDs
* of unplugged devices. */
/* We can link new ED to previous ED safely as the new ED should
* still have set skip bit. */
ed->next_ed = grub_cpu_to_le32 ( grub_ohci_virt_to_phys (o,
bulk, &ed[1]));
return &ed[1];
}
static grub_ohci_td_t
grub_ohci_alloc_td (struct grub_ohci *o)
{
grub_ohci_td_t ret;
/* Check if there is a Transfer Descriptor available. */
if (! o->td_free)
return NULL;
ret = o->td_free; /* Take current free TD */
o->td_free = (grub_ohci_td_t)ret->link_td; /* Advance to next free TD in chain */
ret->link_td = 0; /* Reset link_td in allocated TD */
return ret;
}
static void
grub_ohci_free_td (struct grub_ohci *o, grub_ohci_td_t td)
{
grub_memset ( (void*)td, 0, sizeof(struct grub_ohci_td) );
td->link_td = (grub_uint32_t) o->td_free; /* Cahin new free TD & rest */
o->td_free = td; /* Change address of first free TD */
}
static void
grub_ohci_free_tds (struct grub_ohci *o, grub_ohci_td_t td)
{
if (!td)
return;
/* Unchain first TD from previous TD if it is chained */
if (td->prev_td_phys)
{
grub_ohci_td_t td_prev_virt = grub_ohci_td_phys2virt(o,
td->prev_td_phys);
if (td == (grub_ohci_td_t) td_prev_virt->link_td)
td_prev_virt->link_td = 0;
}
/* Free all TDs from td (chained by link_td) */
while (td)
{
grub_ohci_td_t tdprev;
/* Unlink the queue. */
tdprev = td;
td = (grub_ohci_td_t) td->link_td;
/* Free the TD. */
grub_ohci_free_td (o, tdprev);
}
}
static void
grub_ohci_transaction (grub_ohci_td_t td,
grub_transfer_type_t type, unsigned int toggle,
grub_size_t size, grub_uint32_t data)
{
grub_uint32_t token;
grub_uint32_t buffer;
grub_uint32_t buffer_end;
grub_dprintf ("ohci", "OHCI transaction td=%p type=%d, toggle=%d, size=%d\n",
td, type, toggle, size);
switch (type)
{
case GRUB_USB_TRANSFER_TYPE_SETUP:
token = 0 << 19;
break;
case GRUB_USB_TRANSFER_TYPE_IN:
token = 2 << 19;
break;
case GRUB_USB_TRANSFER_TYPE_OUT:
token = 1 << 19;
break;
default:
token = 0;
break;
}
/* Set the token (Always generate interrupt - bits 21-23 = 0). */
token |= toggle << 24;
token |= 1 << 25;
/* Set "Not accessed" error code */
token |= 15 << 28;
buffer = data;
buffer_end = buffer + size - 1;
/* Set correct buffer values in TD if zero transfer occurs */
if (size)
{
buffer = (grub_uint32_t) data;
buffer_end = buffer + size - 1;
td->buffer = grub_cpu_to_le32 (buffer);
td->buffer_end = grub_cpu_to_le32 (buffer_end);
}
else
{
td->buffer = 0;
td->buffer_end = 0;
}
/* Set the rest of TD */
td->token = grub_cpu_to_le32 (token);
td->next_td = 0;
}
struct grub_ohci_transfer_controller_data
{
grub_uint32_t tderr_phys;
grub_uint32_t td_last_phys;
grub_ohci_ed_t ed_virt;
grub_ohci_td_t td_current_virt;
grub_ohci_td_t td_head_virt;
grub_uint64_t bad_OHCI_delay;
};
static grub_usb_err_t
grub_ohci_setup_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_ohci *o = (struct grub_ohci *) dev->data;
int bulk = 0;
grub_ohci_td_t td_next_virt;
grub_uint32_t target;
grub_uint32_t td_head_phys;
grub_uint32_t td_tail_phys;
int i;
struct grub_ohci_transfer_controller_data *cdata;
cdata = grub_zalloc (sizeof (*cdata));
if (!cdata)
return GRUB_USB_ERR_INTERNAL;
/* Pre-set target for ED - we need it to find proper ED */
/* Set the device address. */
target = transfer->devaddr;
/* Set the endpoint. It should be masked, we need 4 bits only. */
target |= (transfer->endpoint & 15) << 7;
/* Set the device speed. */
target |= (transfer->dev->speed == GRUB_USB_SPEED_LOW) << 13;
/* Set the maximum packet size. */
target |= transfer->max << 16;
/* Determine if transfer type is bulk - we need to select proper ED */
switch (transfer->type)
{
case GRUB_USB_TRANSACTION_TYPE_BULK:
bulk = 1;
break;
case GRUB_USB_TRANSACTION_TYPE_CONTROL:
break;
default:
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
/* Find proper ED or add new ED */
cdata->ed_virt = grub_ohci_find_ed (o, bulk, target);
if (!cdata->ed_virt)
{
grub_dprintf ("ohci","Fatal: No free ED !\n");
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
/* Take pointer to first TD from ED */
td_head_phys = grub_le_to_cpu32 (cdata->ed_virt->td_head) & ~0xf;
td_tail_phys = grub_le_to_cpu32 (cdata->ed_virt->td_tail) & ~0xf;
/* Sanity check - td_head should be equal to td_tail */
if (td_head_phys != td_tail_phys) /* Should never happen ! */
{
grub_dprintf ("ohci", "Fatal: HEAD is not equal to TAIL !\n");
grub_dprintf ("ohci", "HEAD = 0x%02x, TAIL = 0x%02x\n",
td_head_phys, td_tail_phys);
/* XXX: Fix: What to do ? */
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
/* Now we should handle first TD. If ED is newly allocated,
* we must allocate the first TD. */
if (!td_head_phys)
{
cdata->td_head_virt = grub_ohci_alloc_td (o);
if (!cdata->td_head_virt)
return GRUB_USB_ERR_INTERNAL; /* We don't need de-allocate ED */
/* We can set td_head only when ED is not active, i.e.
* when it is newly allocated. */
cdata->ed_virt->td_head
= grub_cpu_to_le32 (grub_ohci_td_virt2phys (o, cdata->td_head_virt));
cdata->ed_virt->td_tail = cdata->ed_virt->td_head;
}
else
cdata->td_head_virt = grub_ohci_td_phys2virt ( o, td_head_phys );
/* Set TDs */
cdata->td_last_phys = td_head_phys; /* initial value to make compiler happy... */
for (i = 0, cdata->td_current_virt = cdata->td_head_virt;
i < transfer->transcnt; i++)
{
grub_usb_transaction_t tr = &transfer->transactions[i];
grub_ohci_transaction (cdata->td_current_virt, tr->pid, tr->toggle,
tr->size, tr->data);
/* Set index of TD in transfer */
cdata->td_current_virt->tr_index = (grub_uint32_t) i;
/* No IRQ request in TD if bad_OHCI set */
if (o->bad_OHCI)
cdata->td_current_virt->token |= grub_cpu_to_le32 ( 7 << 21);
/* Remember last used (processed) TD phys. addr. */
cdata->td_last_phys = grub_ohci_td_virt2phys (o, cdata->td_current_virt);
/* Allocate next TD */
td_next_virt = grub_ohci_alloc_td (o);
if (!td_next_virt) /* No free TD, cancel transfer and free TDs except head TD */
{
if (i) /* if i==0 we have nothing to free... */
grub_ohci_free_tds (o, grub_ohci_td_phys2virt(o,
grub_le_to_cpu32 (cdata->td_head_virt->next_td)));
/* Reset head TD */
grub_memset ( (void*)cdata->td_head_virt, 0,
sizeof(struct grub_ohci_td) );
grub_dprintf ("ohci", "Fatal: No free TD !");
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
/* Chain TDs */
cdata->td_current_virt->link_td = (grub_uint32_t) td_next_virt;
cdata->td_current_virt->next_td
= grub_cpu_to_le32 (grub_ohci_td_virt2phys (o, td_next_virt));
td_next_virt->prev_td_phys
= grub_ohci_td_virt2phys (o, cdata->td_current_virt);
cdata->td_current_virt = td_next_virt;
}
grub_dprintf ("ohci", "Tail TD (not processed) = %p\n",
cdata->td_current_virt);
/* Setup the Endpoint Descriptor for transfer. */
/* First set necessary fields in TARGET but keep (or set) skip bit */
/* Note: It could be simpler if speed, format and max. packet
* size never change after first allocation of ED.
* But unfortunately max. packet size may change during initial
* setup sequence and we must handle it. */
cdata->ed_virt->target = grub_cpu_to_le32 (target | (1 << 14));
/* Set td_tail */
cdata->ed_virt->td_tail
= grub_cpu_to_le32 (grub_ohci_td_virt2phys (o, cdata->td_current_virt));
/* Now reset skip bit */
cdata->ed_virt->target = grub_cpu_to_le32 (target);
/* ed_virt->td_head = grub_cpu_to_le32 (td_head); Must not be changed, it is maintained by OHCI */
/* ed_virt->next_ed = grub_cpu_to_le32 (0); Handled by grub_ohci_find_ed, do not change ! */
grub_dprintf ("ohci", "program OHCI\n");
/* Program the OHCI to actually transfer. */
switch (transfer->type)
{
case GRUB_USB_TRANSACTION_TYPE_BULK:
{
grub_dprintf ("ohci", "BULK list filled\n");
/* Set BulkListFilled. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CMDSTATUS, 1 << 2);
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_CMDSTATUS);
break;
}
case GRUB_USB_TRANSACTION_TYPE_CONTROL:
{
grub_dprintf ("ohci", "CONTROL list filled\n");
/* Set ControlListFilled. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CMDSTATUS, 1 << 1);
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_CMDSTATUS);
break;
}
}
return GRUB_USB_ERR_NONE;
}
static void
pre_finish_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_uint32_t target;
grub_uint32_t status;
grub_uint32_t control;
grub_uint32_t intstatus;
/* There are many ways how the loop above can finish:
* - normally without any error via INTSTATUS WDH bit
* : tderr_phys == td_last_phys, td_head == td_tail
* - normally with error via HALT bit in ED TD HEAD
* : td_head = next TD after TD with error
* : tderr_phys = last processed and retired TD with error,
* i.e. should be != 0
* : if bad_OHCI == TRUE, tderr_phys will be probably invalid
* - unrecoverable error - I never seen it but it could be
* : err_unrec == TRUE, other values can contain anything...
* - timeout, it can be caused by:
* -- bad USB device - some devices have some bugs, see Linux source
* and related links
* -- bad OHCI controller - e.g. lost interrupts or does not set
* proper bits in INTSTATUS when real IRQ not enabled etc.,
* see Linux source and related links
* One known bug is handled - if transfer finished
* successfully (i.e. HEAD==TAIL, last transfer TD is retired,
* HALT bit is not set) and WDH bit is not set in INTSTATUS - in
* this case we set o->bad_OHCI=TRUE and do alternate loop
* and error handling - but there is problem how to find retired
* TD with error code if HALT occurs and if DONEHEAD is not
* working - we need to find TD previous to current ED HEAD
* -- bad code of this driver or some unknown reasons - :-(
* it can be e.g. bad handling of EDs/TDs/toggle bit...
*/
/* Remember target for debug and set skip flag in ED */
/* It should be normaly not necessary but we need it at least
* in case of timeout */
target = grub_le_to_cpu32 ( cdata->ed_virt->target );
cdata->ed_virt->target = grub_cpu_to_le32 (target | (1 << 14));
/* Read registers for debug - they should be read now because
* debug prints case unwanted delays, so something can happen
* in the meantime... */
control = grub_ohci_readreg32 (o, GRUB_OHCI_REG_CONTROL);
status = grub_ohci_readreg32 (o, GRUB_OHCI_REG_CMDSTATUS);
intstatus = grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* Now print debug values - to have full info what happened */
grub_dprintf ("ohci", "loop finished: control=0x%02x status=0x%02x\n",
control, status);
grub_dprintf ("ohci", "intstatus=0x%02x \n\t\t tderr_phys=0x%02x, td_last_phys=0x%02x\n",
intstatus, cdata->tderr_phys, cdata->td_last_phys);
grub_dprintf ("ohci", "TARGET=0x%02x, HEAD=0x%02x, TAIL=0x%02x\n",
target,
grub_le_to_cpu32 (cdata->ed_virt->td_head),
grub_le_to_cpu32 (cdata->ed_virt->td_tail) );
}
static void
finish_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
/* Set empty ED - set HEAD = TAIL = last (not processed) TD */
cdata->ed_virt->td_head = grub_cpu_to_le32 (grub_le_to_cpu32 (cdata->ed_virt->td_tail) & ~0xf);
/* At this point always should be:
* ED has skip bit set and halted or empty or after next SOF,
* i.e. it is safe to free all TDs except last not processed
* ED HEAD == TAIL == phys. addr. of td_current_virt */
/* Reset DoneHead - sanity cleanup */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1 << 1));
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* Un-chainig of last TD */
if (cdata->td_current_virt->prev_td_phys)
{
grub_ohci_td_t td_prev_virt
= grub_ohci_td_phys2virt (o, cdata->td_current_virt->prev_td_phys);
if (cdata->td_current_virt == (grub_ohci_td_t) td_prev_virt->link_td)
td_prev_virt->link_td = 0;
}
grub_dprintf ("ohci", "OHCI finished, freeing\n");
grub_ohci_free_tds (o, cdata->td_head_virt);
}
static grub_usb_err_t
parse_halt (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_uint8_t errcode = 0;
grub_usb_err_t err = GRUB_USB_ERR_NAK;
grub_ohci_td_t tderr_virt = NULL;
*actual = 0;
pre_finish_transfer (dev, transfer);
/* First we must get proper tderr_phys value */
if (o->bad_OHCI) /* In case of bad_OHCI tderr_phys can be wrong */
{
if (cdata->tderr_phys) /* check if tderr_phys points to TD with error */
errcode = grub_le_to_cpu32 (grub_ohci_td_phys2virt (o,
cdata->tderr_phys)->token)
>> 28;
if ( !cdata->tderr_phys || !errcode ) /* tderr_phys not valid or points to wrong TD */
{ /* Retired TD with error should be previous TD to ED->td_head */
cdata->tderr_phys = grub_ohci_td_phys2virt (o,
grub_le_to_cpu32 (cdata->ed_virt->td_head) & ~0xf )
->prev_td_phys;
}
}
/* Even if we have "good" OHCI, in some cases
* tderr_phys can be zero, check it */
else if (!cdata->tderr_phys)
/* Retired TD with error should be previous TD to ED->td_head */
cdata->tderr_phys
= grub_ohci_td_phys2virt (o,
grub_le_to_cpu32 (cdata->ed_virt->td_head)
& ~0xf)->prev_td_phys;
/* Prepare pointer to last processed TD and get error code */
tderr_virt = grub_ohci_td_phys2virt (o, cdata->tderr_phys);
/* Set index of last processed TD */
if (tderr_virt)
{
errcode = grub_le_to_cpu32 (tderr_virt->token) >> 28;
transfer->last_trans = tderr_virt->tr_index;
}
else
transfer->last_trans = -1;
/* Evaluation of error code */
grub_dprintf ("ohci", "OHCI tderr_phys=0x%02x, errcode=0x%02x\n",
cdata->tderr_phys, errcode);
switch (errcode)
{
case 0:
/* XXX: Should not happen! */
grub_error (GRUB_ERR_IO, "OHCI failed without reporting the reason");
err = GRUB_USB_ERR_INTERNAL;
break;
case 1:
/* XXX: CRC error. */
err = GRUB_USB_ERR_TIMEOUT;
break;
case 2:
err = GRUB_USB_ERR_BITSTUFF;
break;
case 3:
/* XXX: Data Toggle error. */
err = GRUB_USB_ERR_DATA;
break;
case 4:
err = GRUB_USB_ERR_STALL;
break;
case 5:
/* XXX: Not responding. */
err = GRUB_USB_ERR_TIMEOUT;
break;
case 6:
/* XXX: PID Check bits failed. */
err = GRUB_USB_ERR_BABBLE;
break;
case 7:
/* XXX: PID unexpected failed. */
err = GRUB_USB_ERR_BABBLE;
break;
case 8:
/* XXX: Data overrun error. */
err = GRUB_USB_ERR_DATA;
grub_dprintf ("ohci", "Overrun, failed TD address: %p, index: %d\n",
tderr_virt, tderr_virt->tr_index);
break;
case 9:
/* XXX: Data underrun error. */
grub_dprintf ("ohci", "Underrun, failed TD address: %p, index: %d\n",
tderr_virt, tderr_virt->tr_index);
if (transfer->last_trans == -1)
break;
*actual = transfer->transactions[transfer->last_trans].size
- (grub_le_to_cpu32 (tderr_virt->buffer_end)
- grub_le_to_cpu32 (tderr_virt->buffer))
+ transfer->transactions[transfer->last_trans].preceding;
err = GRUB_USB_ERR_NONE;
break;
case 10:
/* XXX: Reserved. */
err = GRUB_USB_ERR_NAK;
break;
case 11:
/* XXX: Reserved. */
err = GRUB_USB_ERR_NAK;
break;
case 12:
/* XXX: Buffer overrun. */
err = GRUB_USB_ERR_DATA;
break;
case 13:
/* XXX: Buffer underrun. */
err = GRUB_USB_ERR_DATA;
break;
default:
err = GRUB_USB_ERR_NAK;
break;
}
finish_transfer (dev, transfer);
return err;
}
static grub_usb_err_t
parse_success (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_ohci_td_t tderr_virt = NULL;
pre_finish_transfer (dev, transfer);
/* Simple workaround if donehead is not working */
if (o->bad_OHCI &&
(!cdata->tderr_phys || (cdata->tderr_phys != cdata->td_last_phys)))
{
grub_dprintf ("ohci", "normal finish, but tderr_phys corrected\n");
cdata->tderr_phys = cdata->td_last_phys;
/* I hope we can do it as transfer (most probably) finished OK */
}
/* Prepare pointer to last processed TD */
tderr_virt = grub_ohci_td_phys2virt (o, cdata->tderr_phys);
/* Set index of last processed TD */
if (tderr_virt)
transfer->last_trans = tderr_virt->tr_index;
else
transfer->last_trans = -1;
*actual = transfer->size + 1;
finish_transfer (dev, transfer);
return GRUB_USB_ERR_NONE;
}
static grub_usb_err_t
parse_unrec (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual)
{
struct grub_ohci *o = dev->data;
*actual = 0;
pre_finish_transfer (dev, transfer);
/* Don't try to get error code and last processed TD for proper
* toggle bit value - anything can be invalid */
grub_dprintf("ohci", "Unrecoverable error!");
/* Do OHCI reset in case of unrecoverable error - maybe we will need
* do more - re-enumerate bus etc. (?) */
/* Suspend the OHCI by issuing a reset. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CMDSTATUS, 1); /* XXX: Magic. */
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_CMDSTATUS);
grub_millisleep (1);
grub_dprintf ("ohci", "Unrecoverable error - OHCI reset\n");
/* Misc. resets. */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, 0x7f); /* Clears everything */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLHEAD, o->ed_ctrl_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLCURR, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKHEAD, o->ed_bulk_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKCURR, 0);
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* Enable the OHCI. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROL,
(2 << 6)
| GRUB_OHCI_REG_CONTROL_CONTROL_ENABLE
| GRUB_OHCI_REG_CONTROL_BULK_ENABLE );
finish_transfer (dev, transfer);
return GRUB_USB_ERR_UNRECOVERABLE;
}
static grub_usb_err_t
grub_ohci_check_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_uint32_t intstatus;
/* Check transfer status */
intstatus = grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
if (!o->bad_OHCI && (intstatus & 0x2) != 0)
{
/* Remember last successful TD */
cdata->tderr_phys = grub_le_to_cpu32 (o->hcca->donehead) & ~0xf;
/* Reset DoneHead */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1 << 1));
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* if TD is last, finish */
if (cdata->tderr_phys == cdata->td_last_phys)
{
if (grub_le_to_cpu32 (cdata->ed_virt->td_head) & 1)
return parse_halt (dev, transfer, actual);
else
return parse_success (dev, transfer, actual);
}
return GRUB_USB_ERR_WAIT;
}
if ((intstatus & 0x10) != 0)
/* Unrecoverable error - only reset can help...! */
return parse_unrec (dev, transfer, actual);
/* Detected a HALT. */
if ((grub_le_to_cpu32 (cdata->ed_virt->td_head) & 1))
{
/* ED is halted, but donehead event can happened in the meantime */
intstatus = grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
if (!o->bad_OHCI && (intstatus & 0x2) != 0)
{
/* Remember last successful TD */
cdata->tderr_phys = grub_le_to_cpu32 (o->hcca->donehead) & ~0xf;
/* Reset DoneHead */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1 << 1));
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* if TD is last, finish */
}
return parse_halt (dev, transfer, actual);
}
/* bad OHCI handling */
if ( (grub_le_to_cpu32 (cdata->ed_virt->td_head) & ~0xf) ==
(grub_le_to_cpu32 (cdata->ed_virt->td_tail) & ~0xf) ) /* Empty ED */
{
if (o->bad_OHCI) /* Bad OHCI detected previously */
{
/* Try get last successful TD. */
cdata->tderr_phys = grub_le_to_cpu32 (o->hcca->donehead) & ~0xf;
if (cdata->tderr_phys)/* Reset DoneHead if we were successful */
{
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1 << 1));
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
}
/* Check the HALT bit */
if (grub_le_to_cpu32 (cdata->ed_virt->td_head) & 1)
return parse_halt (dev, transfer, actual);
else
return parse_success (dev, transfer, actual);
}
else /* Detection of bad OHCI */
/* We should wait short time (~2ms) before we say that
* it is bad OHCI to prevent some hazard -
* donehead can react in the meantime. This waiting is done
* only once per OHCI driver "live cycle". */
if (!cdata->bad_OHCI_delay) /* Set delay time */
cdata->bad_OHCI_delay = grub_get_time_ms () + 2;
else if (grub_get_time_ms () >= cdata->bad_OHCI_delay)
o->bad_OHCI = 1;
return GRUB_USB_ERR_WAIT;
}
return GRUB_USB_ERR_WAIT;
}
static grub_usb_err_t
grub_ohci_cancel_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_ohci_td_t tderr_virt = NULL;
pre_finish_transfer (dev, transfer);
grub_dprintf("ohci", "Timeout !\n");
/* We should wait for next SOF to be sure that ED is unaccessed
* by OHCI */
/* SF bit reset. (SF bit indicates Start Of Frame (SOF) packet) */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1<<2));
/* Wait for new SOF */
while ((grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS) & 0x4) == 0);
/* Now we must find last processed TD if bad_OHCI == TRUE */
if (o->bad_OHCI)
/* Retired TD with error should be previous TD to ED->td_head */
cdata->tderr_phys
= grub_ohci_td_phys2virt (o, grub_le_to_cpu32 (cdata->ed_virt->td_head)
& ~0xf)->prev_td_phys;
tderr_virt = grub_ohci_td_phys2virt (o,cdata-> tderr_phys);
if (tderr_virt)
transfer->last_trans = tderr_virt->tr_index;
else
transfer->last_trans = -1;
finish_transfer (dev, transfer);
return GRUB_USB_ERR_NONE;
}
static grub_err_t
grub_ohci_portstatus (grub_usb_controller_t dev,
unsigned int port, unsigned int enable)
{
struct grub_ohci *o = (struct grub_ohci *) dev->data;
grub_uint64_t endtime;
grub_dprintf ("ohci", "begin of portstatus=0x%02x\n",
grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port));
if (!enable) /* We don't need reset port */
{
/* Disable the port and wait for it. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_CLEAR_PORT_ENABLE);
endtime = grub_get_time_ms () + 1000;
while ((grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port)
& (1 << 1)))
if (grub_get_time_ms () > endtime)
return grub_error (GRUB_ERR_IO, "OHCI Timed out - disable");
grub_dprintf ("ohci", "end of portstatus=0x%02x\n",
grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port));
return GRUB_ERR_NONE;
}
/* Reset the port */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_SET_PORT_RESET);
grub_millisleep (50); /* For root hub should be nominaly 50ms */
/* End the reset signaling. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_SET_PORT_RESET_STATUS_CHANGE);
grub_millisleep (10);
/* Enable the port and wait for it. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_SET_PORT_ENABLE);
endtime = grub_get_time_ms () + 1000;
while (! (grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port)
& (1 << 1)))
if (grub_get_time_ms () > endtime)
return grub_error (GRUB_ERR_IO, "OHCI Timed out - enable");
grub_millisleep (10);
/* Reset bit Connect Status Change */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_RESET_CONNECT_CHANGE);
grub_dprintf ("ohci", "end of portstatus=0x%02x\n",
grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port));
return GRUB_ERR_NONE;
}
static grub_usb_speed_t
grub_ohci_detect_dev (grub_usb_controller_t dev, int port, int *changed)
{
struct grub_ohci *o = (struct grub_ohci *) dev->data;
grub_uint32_t status;
status = grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port);
grub_dprintf ("ohci", "detect_dev status=0x%02x\n", status);
/* Connect Status Change bit - it detects change of connection */
*changed = ((status & GRUB_OHCI_RESET_CONNECT_CHANGE) != 0);
if (! (status & 1))
return GRUB_USB_SPEED_NONE;
else if (status & (1 << 9))
return GRUB_USB_SPEED_LOW;
else
return GRUB_USB_SPEED_FULL;
}
static int
grub_ohci_hubports (grub_usb_controller_t dev)
{
struct grub_ohci *o = (struct grub_ohci *) dev->data;
grub_uint32_t portinfo;
portinfo = grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBA);
grub_dprintf ("ohci", "root hub ports=%d\n", portinfo & 0xFF);
return portinfo & 0xFF;
}
static grub_err_t
grub_ohci_fini_hw (int noreturn __attribute__ ((unused)))
{
struct grub_ohci *o;
for (o = ohci; o; o = o->next)
{
int i, nports = grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBA) & 0xff;
grub_uint64_t maxtime;
/* Set skip in all EDs */
if (o->ed_bulk)
for (i=0; i < GRUB_OHCI_BULK_EDS; i++)
o->ed_bulk[i].target |= grub_cpu_to_le32 (1 << 14); /* skip */
if (o->ed_ctrl)
for (i=0; i < GRUB_OHCI_CTRL_EDS; i++)
o->ed_ctrl[i].target |= grub_cpu_to_le32 (1 << 14); /* skip */
/* We should wait for next SOF to be sure that all EDs are
* unaccessed by OHCI. But OHCI can be non-functional, so
* more than 1ms timeout have to be applied. */
/* SF bit reset. (SF bit indicates Start Of Frame (SOF) packet) */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1<<2));
maxtime = grub_get_time_ms () + 2;
/* Wait for new SOF or timeout */
while ( ((grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS) & 0x4)
== 0) || (grub_get_time_ms () >= maxtime) );
for (i = 0; i < nports; i++)
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + i,
GRUB_OHCI_CLEAR_PORT_ENABLE);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CMDSTATUS, 1);
grub_millisleep (1);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_HCCA, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLHEAD, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLCURR, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKHEAD, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKCURR, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_DONEHEAD, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROL, 0);
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
#if 0 /* Is this necessary before booting? Probably not .(?)
* But it must be done if module is removed ! (Or not ?)
* How to do it ? - Probably grub_ohci_restore_hw should be more
* complicated. (?)
* (If we do it, we need to reallocate EDs and TDs in function
* grub_ohci_restore_hw ! */
/* Free allocated EDs and TDs */
grub_dma_free (o->td_chunk);
grub_dma_free (o->ed_bulk_chunk);
grub_dma_free (o->ed_ctrl_chunk);
grub_dma_free (o->hcca_chunk);
#endif
}
grub_millisleep (10);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_ohci_restore_hw (void)
{
struct grub_ohci *o;
for (o = ohci; o; o = o->next)
{
grub_ohci_writereg32 (o, GRUB_OHCI_REG_HCCA, o->hcca_addr);
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, 0x7f); /* Clears everything */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLHEAD, o->ed_ctrl_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLCURR, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKHEAD, o->ed_bulk_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKCURR, 0);
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* Enable the OHCI. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROL,
(2 << 6)
| GRUB_OHCI_REG_CONTROL_CONTROL_ENABLE
| GRUB_OHCI_REG_CONTROL_BULK_ENABLE );
}
return GRUB_ERR_NONE;
}
static struct grub_usb_controller_dev usb_controller =
{
.name = "ohci",
.iterate = grub_ohci_iterate,
.setup_transfer = grub_ohci_setup_transfer,
.check_transfer = grub_ohci_check_transfer,
.cancel_transfer = grub_ohci_cancel_transfer,
.hubports = grub_ohci_hubports,
.portstatus = grub_ohci_portstatus,
.detect_dev = grub_ohci_detect_dev
};
GRUB_MOD_INIT(ohci)
{
grub_ohci_inithw ();
grub_usb_controller_dev_register (&usb_controller);
grub_loader_register_preboot_hook (grub_ohci_fini_hw, grub_ohci_restore_hw,
GRUB_LOADER_PREBOOT_HOOK_PRIO_DISK);
}
GRUB_MOD_FINI(ohci)
{
grub_ohci_fini_hw (0);
grub_usb_controller_dev_unregister (&usb_controller);
}
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