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author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-04-30 09:01:04 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-04-30 09:01:04 -0300 |
commit | df90e2258950fd631cdbf322c1ee1f22068391aa (patch) | |
tree | 0b6dd2717c04bb7f93db6abdeda208aeea4cd74e /drivers/media/common/cypress_firmware.c | |
parent | aad797c89903d570c17f6affc770eb98afd74e62 (diff) | |
parent | 02615ed5e1b2283db2495af3cf8f4ee172c77d80 (diff) |
Merge branch 'devel-for-v3.10' into v4l_for_linus
* patchwork: (831 commits)
[media] cx88: make core less verbose
[media] em28xx: fix oops at em28xx_dvb_bus_ctrl()
[media] s5c73m3: fix indentation of the help section in Kconfig
[media] cx25821-alsa: get rid of a __must_check warning
[media] cx25821-video: declare cx25821_vidioc_s_std as static
[media] cx25821-video: remove maxw from cx25821_vidioc_try_fmt_vid_cap
[media] r820t: Remove a warning for an unused value
[media] dib0090: Fix a warning at dib0090_set_EFUSE
[media] dib8000: fix a warning
[media] dib8000: Fix sub-channel range
[media] dib8000: store dtv_property_cache in a temp var
[media] dib8000: warning fix: declare internal functions as static
[media] r820t: quiet gcc warning on n_ring
[media] r820t: memory leak in release()
[media] r820t: precendence bug in r820t_xtal_check()
[media] videodev2.h: Remove the unused old V4L1 buffer types
[media] anysee: Grammar s/report the/report to/
[media] anysee: Initialize ret = 0 in anysee_frontend_attach()
[media] media: videobuf2: fix the length check for mmap
[media] em28xx: save isoc endpoint number for DVB only if endpoint has alt settings with xMaxPacketSize != 0
...
Conflicts:
drivers/media/pci/cx25821/cx25821-video.c
drivers/media/platform/Kconfig
Diffstat (limited to 'drivers/media/common/cypress_firmware.c')
-rw-r--r-- | drivers/media/common/cypress_firmware.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/media/common/cypress_firmware.c b/drivers/media/common/cypress_firmware.c new file mode 100644 index 00000000000..577e82058fd --- /dev/null +++ b/drivers/media/common/cypress_firmware.c @@ -0,0 +1,132 @@ +/* cypress_firmware.c is part of the DVB USB library. + * + * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de) + * see dvb-usb-init.c for copyright information. + * + * This file contains functions for downloading the firmware to Cypress FX 1 + * and 2 based devices. + * + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/usb.h> +#include <linux/firmware.h> +#include "cypress_firmware.h" + +struct usb_cypress_controller { + u8 id; + const char *name; /* name of the usb controller */ + u16 cs_reg; /* needs to be restarted, + * when the firmware has been downloaded */ +}; + +static const struct usb_cypress_controller cypress[] = { + { .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 }, + { .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 }, + { .id = CYPRESS_FX2, .name = "Cypress FX2", .cs_reg = 0xe600 }, +}; + +/* + * load a firmware packet to the device + */ +static int usb_cypress_writemem(struct usb_device *udev, u16 addr, u8 *data, + u8 len) +{ + return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + 0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000); +} + +static int cypress_get_hexline(const struct firmware *fw, + struct hexline *hx, int *pos) +{ + u8 *b = (u8 *) &fw->data[*pos]; + int data_offs = 4; + + if (*pos >= fw->size) + return 0; + + memset(hx, 0, sizeof(struct hexline)); + hx->len = b[0]; + + if ((*pos + hx->len + 4) >= fw->size) + return -EINVAL; + + hx->addr = b[1] | (b[2] << 8); + hx->type = b[3]; + + if (hx->type == 0x04) { + /* b[4] and b[5] are the Extended linear address record data + * field */ + hx->addr |= (b[4] << 24) | (b[5] << 16); + } + + memcpy(hx->data, &b[data_offs], hx->len); + hx->chk = b[hx->len + data_offs]; + *pos += hx->len + 5; + + return *pos; +} + +int cypress_load_firmware(struct usb_device *udev, + const struct firmware *fw, int type) +{ + struct hexline *hx; + int ret, pos = 0; + + hx = kmalloc(sizeof(struct hexline), GFP_KERNEL); + if (!hx) { + dev_err(&udev->dev, "%s: kmalloc() failed\n", KBUILD_MODNAME); + return -ENOMEM; + } + + /* stop the CPU */ + hx->data[0] = 1; + ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1); + if (ret != 1) { + dev_err(&udev->dev, "%s: CPU stop failed=%d\n", + KBUILD_MODNAME, ret); + ret = -EIO; + goto err_kfree; + } + + /* write firmware to memory */ + for (;;) { + ret = cypress_get_hexline(fw, hx, &pos); + if (ret < 0) + goto err_kfree; + else if (ret == 0) + break; + + ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len); + if (ret < 0) { + goto err_kfree; + } else if (ret != hx->len) { + dev_err(&udev->dev, + "%s: error while transferring firmware (transferred size=%d, block size=%d)\n", + KBUILD_MODNAME, ret, hx->len); + ret = -EIO; + goto err_kfree; + } + } + + /* start the CPU */ + hx->data[0] = 0; + ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1); + if (ret != 1) { + dev_err(&udev->dev, "%s: CPU start failed=%d\n", + KBUILD_MODNAME, ret); + ret = -EIO; + goto err_kfree; + } + + ret = 0; +err_kfree: + kfree(hx); + return ret; +} +EXPORT_SYMBOL(cypress_load_firmware); + +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_DESCRIPTION("Cypress firmware download"); +MODULE_LICENSE("GPL"); |