diff options
Diffstat (limited to 'cfe/cfe/dev/dev_bcm1250.c')
| -rw-r--r-- | cfe/cfe/dev/dev_bcm1250.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/cfe/cfe/dev/dev_bcm1250.c b/cfe/cfe/dev/dev_bcm1250.c new file mode 100644 index 0000000..8343a46 --- /dev/null +++ b/cfe/cfe/dev/dev_bcm1250.c @@ -0,0 +1,275 @@ +/* ********************************************************************* + * Broadcom Common Firmware Environment (CFE) + * + * BCM1250 (BCM1250 as PCI device) driver File: dev_bcm1250.c + * + ********************************************************************* + * + * Copyright 2000,2001,2002,2003 + * Broadcom Corporation. All rights reserved. + * + * This software is furnished under license and may be used and + * copied only in accordance with the following terms and + * conditions. Subject to these conditions, you may download, + * copy, install, use, modify and distribute modified or unmodified + * copies of this software in source and/or binary form. No title + * or ownership is transferred hereby. + * + * 1) Any source code used, modified or distributed must reproduce + * and retain this copyright notice and list of conditions + * as they appear in the source file. + * + * 2) No right is granted to use any trade name, trademark, or + * logo of Broadcom Corporation. The "Broadcom Corporation" + * name may not be used to endorse or promote products derived + * from this software without the prior written permission of + * Broadcom Corporation. + * + * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED + * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR + * PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT + * SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN + * PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + ********************************************************************* */ + + +#include "sbmips.h" + +#ifndef _SB_MAKE64 +#define _SB_MAKE64(x) ((uint64_t)(x)) +#endif +#ifndef _SB_MAKEMASK1 +#define _SB_MAKEMASK1(n) (_SB_MAKE64(1) << _SB_MAKE64(n)) +#endif + +#include "lib_types.h" +#include "lib_hssubr.h" +#include "lib_malloc.h" +#include "lib_printf.h" + +#include "cfe_iocb.h" +#include "cfe_error.h" +#include "cfe_device.h" + +#include "pcivar.h" +#include "pcireg.h" + +#include "bsp_config.h" + +/* Note that PHYSADDR only works with 32-bit addresses */ +#define PHYSADDR(x) (K0_TO_PHYS((uint32_t)(uintptr_t)(x))) + + +static void bcm1250_probe(cfe_driver_t *drv, + unsigned long probe_a, unsigned long probe_b, + void *probe_ptr); + +static int bcm1250_open(cfe_devctx_t *ctx); +static int bcm1250_read(cfe_devctx_t *ctx,iocb_buffer_t *buffer); +static int bcm1250_inpstat(cfe_devctx_t *ctx,iocb_inpstat_t *inpstat); +static int bcm1250_write(cfe_devctx_t *ctx,iocb_buffer_t *buffer); +static int bcm1250_ioctl(cfe_devctx_t *ctx,iocb_buffer_t *buffer); +static int bcm1250_close(cfe_devctx_t *ctx); + +const static cfe_devdisp_t bcm1250_dispatch = { + bcm1250_open, + bcm1250_read, + bcm1250_inpstat, + bcm1250_write, + bcm1250_ioctl, + bcm1250_close, + NULL, + NULL +}; + +const cfe_driver_t bcm1250drv = { + "BCM1250", + "widget", + CFE_DEV_OTHER, + &bcm1250_dispatch, + bcm1250_probe +}; + + +typedef struct bcm1250_s { + uint64_t mailbox; + uint64_t mem_base; + uint8_t irq; /* interrupt mapping */ + pcitag_t tag; /* tag for configuration register */ + + int downloaded; /* code has already been downloaded. */ +} bcm1250_t; + + +/* + * BCM1250_PROBE + * probe_a, probe_b and probe_ptr all unused + */ + +static void +bcm1250_probe(cfe_driver_t *drv, + unsigned long probe_a, unsigned long probe_b, + void *probe_ptr) +{ + int index; + + index = 0; + for (;;) { + pcitag_t tag; + + if (pci_find_device(0x166d, 0x0001, index, &tag) != 0) + break; + + if (tag != 0x00000000) { /* don't configure ourselves */ + bcm1250_t *softc; + char descr[80]; + phys_addr_t pa; + + softc = (bcm1250_t *) KMALLOC(sizeof(bcm1250_t), 0); + if (softc == NULL) { + xprintf("BCM1250: No memory to complete probe\n"); + break; + } + + softc->tag = tag; + + pci_map_mem(tag, PCI_MAPREG(0), PCI_MATCH_BYTES, &pa); + xsprintf(descr, "%s at 0x%X", drv->drv_description, (uint32_t)pa); + softc->mem_base = PHYS_TO_XKSEG_UNCACHED(pa); + + /* Map the CPU0 mailbox registers of the device 1250. + Note that our BAR2 space maps to its "alias" mailbox + registers. Set bit 3 for mbox_set; clear bit 3 for + reading. Address bits 15-4 are don't cares. */ + pci_map_mem(tag, PCI_MAPREG(2), PCI_MATCH_BYTES, &pa); + softc->mailbox = PHYS_TO_XKSEG_UNCACHED(pa); + + softc->downloaded = 0; + + cfe_attach(drv, softc, NULL, descr); + } + index++; + } +} + + +#include "elf.h" + +static int +elf_header (const uint8_t *hdr) +{ + return (hdr[EI_MAG0] == ELFMAG0 && + hdr[EI_MAG1] == ELFMAG1 && + hdr[EI_MAG2] == ELFMAG2 && + hdr[EI_MAG3] == ELFMAG3); +} + + +#include "cfe_timer.h" + +typedef struct { + uint32_t addr; /* source address, in device's PCI space */ + uint32_t len; /* length of this chunk */ +} chunk_desc; + + +#define MBOX_SET_BIT 0x8 + +extern void download_start(void), download_end(void); + +static int +bcm1250_open(cfe_devctx_t *ctx) +{ + bcm1250_t *softc = ctx->dev_softc; + uint64_t cmd_p = softc->mailbox + 4; + + if (softc->downloaded) { + xprintf("bcm1250_open: Warning: Device previously downloaded\n"); + softc->downloaded = 0; + } + + if (hs_read32(cmd_p) != 0) { + xprintf("bcm1250_open: Device not in initial state\n"); + return -1; + } + + return 0; +} + +static int +bcm1250_read(cfe_devctx_t *ctx, iocb_buffer_t *buffer) +{ + return -1; +} + +static int +bcm1250_inpstat(cfe_devctx_t *ctx, iocb_inpstat_t *inpstat) +{ + return -1; +} + +static int +bcm1250_write(cfe_devctx_t *ctx, iocb_buffer_t *buffer) +{ + bcm1250_t *softc = ctx->dev_softc; + uint64_t arg_p = softc->mailbox + 0; + uint64_t cmd_p = softc->mailbox + 4; + chunk_desc code; + uint32_t cmd; + int64_t timer; + int res; + + /* Note: This code assumes that PHYSADDR gives a PCI memory space + address that is accessible via our BAR4 or BAR5 */ + + code.addr = PHYSADDR((uint8_t *)buffer->buf_ptr); + code.len = buffer->buf_length; + + cmd = 0x1; /* load */ + if (!elf_header((uint8_t *)buffer->buf_ptr)) { + /* No recognizable elf seal, so assume compressed. */ + cmd |= 0x2; + } + + hs_write32(arg_p | MBOX_SET_BIT, PHYSADDR(&code)); + hs_write32(cmd_p | MBOX_SET_BIT, cmd); /* load */ + + /* Wait for handshake */ + + res = CFE_ERR_TIMEOUT; + TIMER_SET(timer, 5*CFE_HZ); + while (!TIMER_EXPIRED(timer)) { + if ((hs_read32(cmd_p) & 0x3) == 0) { + softc->downloaded = 1; + buffer->buf_retlen = 0; /* XXX check this */ + /* Note that the result code need not be translated only + because we are assuming a CFE in the device that is + compatible with us. */ + res = (int)hs_read32(arg_p); + break; + } + POLL(); + } + + return res; +} + +static int +bcm1250_ioctl(cfe_devctx_t *ctx,iocb_buffer_t *buffer) +{ + return -1; +} + +static int +bcm1250_close(cfe_devctx_t *ctx) +{ + return 0; +} |