![Michael Buesch](/assets/img/avatar_default.png)
This adds support for block based I/O to SSB. This is needed in order to efficiently support PIO data transfers to the card. The block-I/O support is only compiled, if it's selected by the weird driver that needs it. So there's no overhead for sane devices. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
796 lines
21 KiB
C
796 lines
21 KiB
C
/*
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* Sonics Silicon Backplane PCI-Hostbus related functions.
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*
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* Copyright (C) 2005-2006 Michael Buesch <mb@bu3sch.de>
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* Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
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* Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
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* Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
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* Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
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*
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* Derived from the Broadcom 4400 device driver.
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* Copyright (C) 2002 David S. Miller (davem@redhat.com)
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* Fixed by Pekka Pietikainen (pp@ee.oulu.fi)
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* Copyright (C) 2006 Broadcom Corporation.
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include <linux/ssb/ssb.h>
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#include <linux/ssb/ssb_regs.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include "ssb_private.h"
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/* Define the following to 1 to enable a printk on each coreswitch. */
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#define SSB_VERBOSE_PCICORESWITCH_DEBUG 0
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/* Lowlevel coreswitching */
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int ssb_pci_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
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{
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int err;
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int attempts = 0;
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u32 cur_core;
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while (1) {
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err = pci_write_config_dword(bus->host_pci, SSB_BAR0_WIN,
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(coreidx * SSB_CORE_SIZE)
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+ SSB_ENUM_BASE);
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if (err)
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goto error;
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err = pci_read_config_dword(bus->host_pci, SSB_BAR0_WIN,
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&cur_core);
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if (err)
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goto error;
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cur_core = (cur_core - SSB_ENUM_BASE)
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/ SSB_CORE_SIZE;
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if (cur_core == coreidx)
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break;
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if (attempts++ > SSB_BAR0_MAX_RETRIES)
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goto error;
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udelay(10);
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}
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return 0;
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error:
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ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
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return -ENODEV;
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}
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int ssb_pci_switch_core(struct ssb_bus *bus,
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struct ssb_device *dev)
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{
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int err;
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unsigned long flags;
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#if SSB_VERBOSE_PCICORESWITCH_DEBUG
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ssb_printk(KERN_INFO PFX
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"Switching to %s core, index %d\n",
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ssb_core_name(dev->id.coreid),
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dev->core_index);
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#endif
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spin_lock_irqsave(&bus->bar_lock, flags);
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err = ssb_pci_switch_coreidx(bus, dev->core_index);
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if (!err)
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bus->mapped_device = dev;
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spin_unlock_irqrestore(&bus->bar_lock, flags);
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return err;
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}
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/* Enable/disable the on board crystal oscillator and/or PLL. */
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int ssb_pci_xtal(struct ssb_bus *bus, u32 what, int turn_on)
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{
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int err;
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u32 in, out, outenable;
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u16 pci_status;
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if (bus->bustype != SSB_BUSTYPE_PCI)
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return 0;
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err = pci_read_config_dword(bus->host_pci, SSB_GPIO_IN, &in);
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if (err)
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goto err_pci;
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err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT, &out);
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if (err)
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goto err_pci;
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err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, &outenable);
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if (err)
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goto err_pci;
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outenable |= what;
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if (turn_on) {
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/* Avoid glitching the clock if GPRS is already using it.
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* We can't actually read the state of the PLLPD so we infer it
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* by the value of XTAL_PU which *is* readable via gpioin.
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*/
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if (!(in & SSB_GPIO_XTAL)) {
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if (what & SSB_GPIO_XTAL) {
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/* Turn the crystal on */
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out |= SSB_GPIO_XTAL;
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if (what & SSB_GPIO_PLL)
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out |= SSB_GPIO_PLL;
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err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
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if (err)
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goto err_pci;
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err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE,
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outenable);
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if (err)
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goto err_pci;
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msleep(1);
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}
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if (what & SSB_GPIO_PLL) {
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/* Turn the PLL on */
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out &= ~SSB_GPIO_PLL;
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err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
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if (err)
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goto err_pci;
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msleep(5);
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}
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}
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err = pci_read_config_word(bus->host_pci, PCI_STATUS, &pci_status);
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if (err)
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goto err_pci;
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pci_status &= ~PCI_STATUS_SIG_TARGET_ABORT;
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err = pci_write_config_word(bus->host_pci, PCI_STATUS, pci_status);
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if (err)
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goto err_pci;
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} else {
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if (what & SSB_GPIO_XTAL) {
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/* Turn the crystal off */
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out &= ~SSB_GPIO_XTAL;
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}
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if (what & SSB_GPIO_PLL) {
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/* Turn the PLL off */
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out |= SSB_GPIO_PLL;
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}
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err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
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if (err)
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goto err_pci;
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err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, outenable);
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if (err)
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goto err_pci;
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}
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out:
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return err;
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err_pci:
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printk(KERN_ERR PFX "Error: ssb_pci_xtal() could not access PCI config space!\n");
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err = -EBUSY;
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goto out;
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}
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/* Get the word-offset for a SSB_SPROM_XXX define. */
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#define SPOFF(offset) (((offset) - SSB_SPROM_BASE) / sizeof(u16))
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/* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */
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#define SPEX(_outvar, _offset, _mask, _shift) \
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out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
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static inline u8 ssb_crc8(u8 crc, u8 data)
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{
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/* Polynomial: x^8 + x^7 + x^6 + x^4 + x^2 + 1 */
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static const u8 t[] = {
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0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
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0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
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0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
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0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
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0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
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0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
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0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
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0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
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0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
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0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
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0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
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0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
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0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
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0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
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0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
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0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
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0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
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0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
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0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
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0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
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0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
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0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
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0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
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0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
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0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
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0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
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0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
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0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
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0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
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0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
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0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
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0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
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};
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return t[crc ^ data];
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}
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static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
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{
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int word;
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u8 crc = 0xFF;
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for (word = 0; word < size - 1; word++) {
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crc = ssb_crc8(crc, sprom[word] & 0x00FF);
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crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
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}
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crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
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crc ^= 0xFF;
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return crc;
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}
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static int sprom_check_crc(const u16 *sprom, size_t size)
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{
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u8 crc;
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u8 expected_crc;
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u16 tmp;
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crc = ssb_sprom_crc(sprom, size);
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tmp = sprom[size - 1] & SSB_SPROM_REVISION_CRC;
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expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
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if (crc != expected_crc)
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return -EPROTO;
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return 0;
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}
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static int sprom_do_read(struct ssb_bus *bus, u16 *sprom)
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{
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int i;
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for (i = 0; i < bus->sprom_size; i++)
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sprom[i] = ioread16(bus->mmio + SSB_SPROM_BASE + (i * 2));
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return 0;
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}
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static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
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{
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struct pci_dev *pdev = bus->host_pci;
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int i, err;
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u32 spromctl;
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u16 size = bus->sprom_size;
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ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
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err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
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if (err)
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goto err_ctlreg;
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spromctl |= SSB_SPROMCTL_WE;
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err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
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if (err)
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goto err_ctlreg;
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ssb_printk(KERN_NOTICE PFX "[ 0%%");
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msleep(500);
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for (i = 0; i < size; i++) {
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if (i == size / 4)
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ssb_printk("25%%");
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else if (i == size / 2)
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ssb_printk("50%%");
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else if (i == (size * 3) / 4)
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ssb_printk("75%%");
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else if (i % 2)
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ssb_printk(".");
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writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
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mmiowb();
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msleep(20);
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}
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err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
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if (err)
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goto err_ctlreg;
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spromctl &= ~SSB_SPROMCTL_WE;
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err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
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if (err)
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goto err_ctlreg;
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msleep(500);
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ssb_printk("100%% ]\n");
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ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
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return 0;
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err_ctlreg:
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ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
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return err;
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}
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static s8 r123_extract_antgain(u8 sprom_revision, const u16 *in,
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u16 mask, u16 shift)
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{
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u16 v;
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u8 gain;
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v = in[SPOFF(SSB_SPROM1_AGAIN)];
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gain = (v & mask) >> shift;
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if (gain == 0xFF)
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gain = 2; /* If unset use 2dBm */
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if (sprom_revision == 1) {
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/* Convert to Q5.2 */
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gain <<= 2;
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} else {
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/* Q5.2 Fractional part is stored in 0xC0 */
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gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
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}
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return (s8)gain;
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}
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static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
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{
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int i;
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u16 v;
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s8 gain;
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u16 loc[3];
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if (out->revision == 3) { /* rev 3 moved MAC */
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loc[0] = SSB_SPROM3_IL0MAC;
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loc[1] = SSB_SPROM3_ET0MAC;
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loc[2] = SSB_SPROM3_ET1MAC;
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} else {
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loc[0] = SSB_SPROM1_IL0MAC;
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loc[1] = SSB_SPROM1_ET0MAC;
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loc[2] = SSB_SPROM1_ET1MAC;
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}
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for (i = 0; i < 3; i++) {
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v = in[SPOFF(loc[0]) + i];
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*(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
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}
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for (i = 0; i < 3; i++) {
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v = in[SPOFF(loc[1]) + i];
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*(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
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}
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for (i = 0; i < 3; i++) {
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v = in[SPOFF(loc[2]) + i];
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*(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
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}
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SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0);
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SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A,
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SSB_SPROM1_ETHPHY_ET1A_SHIFT);
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SPEX(et0mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0M, 14);
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SPEX(et1mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1M, 15);
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SPEX(board_rev, SSB_SPROM1_BINF, SSB_SPROM1_BINF_BREV, 0);
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SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
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SSB_SPROM1_BINF_CCODE_SHIFT);
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SPEX(ant_available_a, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTA,
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SSB_SPROM1_BINF_ANTA_SHIFT);
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SPEX(ant_available_bg, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTBG,
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SSB_SPROM1_BINF_ANTBG_SHIFT);
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SPEX(pa0b0, SSB_SPROM1_PA0B0, 0xFFFF, 0);
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SPEX(pa0b1, SSB_SPROM1_PA0B1, 0xFFFF, 0);
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SPEX(pa0b2, SSB_SPROM1_PA0B2, 0xFFFF, 0);
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SPEX(pa1b0, SSB_SPROM1_PA1B0, 0xFFFF, 0);
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SPEX(pa1b1, SSB_SPROM1_PA1B1, 0xFFFF, 0);
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SPEX(pa1b2, SSB_SPROM1_PA1B2, 0xFFFF, 0);
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SPEX(gpio0, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P0, 0);
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SPEX(gpio1, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P1,
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SSB_SPROM1_GPIOA_P1_SHIFT);
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SPEX(gpio2, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P2, 0);
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SPEX(gpio3, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P3,
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SSB_SPROM1_GPIOB_P3_SHIFT);
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SPEX(maxpwr_a, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_A,
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SSB_SPROM1_MAXPWR_A_SHIFT);
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SPEX(maxpwr_bg, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_BG, 0);
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SPEX(itssi_a, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_A,
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SSB_SPROM1_ITSSI_A_SHIFT);
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SPEX(itssi_bg, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_BG, 0);
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SPEX(boardflags_lo, SSB_SPROM1_BFLLO, 0xFFFF, 0);
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if (out->revision >= 2)
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SPEX(boardflags_hi, SSB_SPROM2_BFLHI, 0xFFFF, 0);
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/* Extract the antenna gain values. */
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gain = r123_extract_antgain(out->revision, in,
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SSB_SPROM1_AGAIN_BG,
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SSB_SPROM1_AGAIN_BG_SHIFT);
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out->antenna_gain.ghz24.a0 = gain;
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out->antenna_gain.ghz24.a1 = gain;
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out->antenna_gain.ghz24.a2 = gain;
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out->antenna_gain.ghz24.a3 = gain;
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gain = r123_extract_antgain(out->revision, in,
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|
SSB_SPROM1_AGAIN_A,
|
|
SSB_SPROM1_AGAIN_A_SHIFT);
|
|
out->antenna_gain.ghz5.a0 = gain;
|
|
out->antenna_gain.ghz5.a1 = gain;
|
|
out->antenna_gain.ghz5.a2 = gain;
|
|
out->antenna_gain.ghz5.a3 = gain;
|
|
}
|
|
|
|
static void sprom_extract_r4(struct ssb_sprom *out, const u16 *in)
|
|
{
|
|
int i;
|
|
u16 v;
|
|
|
|
/* extract the equivalent of the r1 variables */
|
|
for (i = 0; i < 3; i++) {
|
|
v = in[SPOFF(SSB_SPROM4_IL0MAC) + i];
|
|
*(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
|
|
}
|
|
for (i = 0; i < 3; i++) {
|
|
v = in[SPOFF(SSB_SPROM4_ET0MAC) + i];
|
|
*(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
|
|
}
|
|
for (i = 0; i < 3; i++) {
|
|
v = in[SPOFF(SSB_SPROM4_ET1MAC) + i];
|
|
*(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
|
|
}
|
|
SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
|
|
SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
|
|
SSB_SPROM4_ETHPHY_ET1A_SHIFT);
|
|
SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
|
|
SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
|
|
SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
|
|
SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
|
|
SSB_SPROM4_ANTAVAIL_A_SHIFT);
|
|
SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
|
|
SSB_SPROM4_ANTAVAIL_BG_SHIFT);
|
|
SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
|
|
SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
|
|
SSB_SPROM4_ITSSI_BG_SHIFT);
|
|
SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
|
|
SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
|
|
SSB_SPROM4_ITSSI_A_SHIFT);
|
|
SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
|
|
SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
|
|
SSB_SPROM4_GPIOA_P1_SHIFT);
|
|
SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
|
|
SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
|
|
SSB_SPROM4_GPIOB_P3_SHIFT);
|
|
|
|
/* Extract the antenna gain values. */
|
|
SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
|
|
SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
|
|
SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
|
|
SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
|
|
SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
|
|
SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
|
|
SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
|
|
SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
|
|
memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
|
|
sizeof(out->antenna_gain.ghz5));
|
|
|
|
/* TODO - get remaining rev 4 stuff needed */
|
|
}
|
|
|
|
static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
|
|
const u16 *in, u16 size)
|
|
{
|
|
memset(out, 0, sizeof(*out));
|
|
|
|
out->revision = in[size - 1] & 0x00FF;
|
|
ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
|
|
if ((bus->chip_id & 0xFF00) == 0x4400) {
|
|
/* Workaround: The BCM44XX chip has a stupid revision
|
|
* number stored in the SPROM.
|
|
* Always extract r1. */
|
|
out->revision = 1;
|
|
sprom_extract_r123(out, in);
|
|
} else if (bus->chip_id == 0x4321) {
|
|
/* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */
|
|
out->revision = 4;
|
|
sprom_extract_r4(out, in);
|
|
} else {
|
|
if (out->revision == 0)
|
|
goto unsupported;
|
|
if (out->revision >= 1 && out->revision <= 3) {
|
|
sprom_extract_r123(out, in);
|
|
}
|
|
if (out->revision == 4)
|
|
sprom_extract_r4(out, in);
|
|
if (out->revision >= 5)
|
|
goto unsupported;
|
|
}
|
|
|
|
return 0;
|
|
unsupported:
|
|
ssb_printk(KERN_WARNING PFX "Unsupported SPROM revision %d "
|
|
"detected. Will extract v1\n", out->revision);
|
|
sprom_extract_r123(out, in);
|
|
return 0;
|
|
}
|
|
|
|
static int ssb_pci_sprom_get(struct ssb_bus *bus,
|
|
struct ssb_sprom *sprom)
|
|
{
|
|
int err = -ENOMEM;
|
|
u16 *buf;
|
|
|
|
buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
|
|
if (!buf)
|
|
goto out;
|
|
bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
|
|
sprom_do_read(bus, buf);
|
|
err = sprom_check_crc(buf, bus->sprom_size);
|
|
if (err) {
|
|
/* check for rev 4 sprom - has special signature */
|
|
if (buf[32] == 0x5372) {
|
|
kfree(buf);
|
|
buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
|
|
GFP_KERNEL);
|
|
if (!buf)
|
|
goto out;
|
|
bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
|
|
sprom_do_read(bus, buf);
|
|
err = sprom_check_crc(buf, bus->sprom_size);
|
|
}
|
|
if (err)
|
|
ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
|
|
" SPROM CRC (corrupt SPROM)\n");
|
|
}
|
|
err = sprom_extract(bus, sprom, buf, bus->sprom_size);
|
|
|
|
kfree(buf);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
|
|
struct ssb_boardinfo *bi)
|
|
{
|
|
pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
|
|
&bi->vendor);
|
|
pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
|
|
&bi->type);
|
|
pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
|
|
&bi->rev);
|
|
}
|
|
|
|
int ssb_pci_get_invariants(struct ssb_bus *bus,
|
|
struct ssb_init_invariants *iv)
|
|
{
|
|
int err;
|
|
|
|
err = ssb_pci_sprom_get(bus, &iv->sprom);
|
|
if (err)
|
|
goto out;
|
|
ssb_pci_get_boardinfo(bus, &iv->boardinfo);
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_SSB_DEBUG
|
|
static int ssb_pci_assert_buspower(struct ssb_bus *bus)
|
|
{
|
|
if (likely(bus->powered_up))
|
|
return 0;
|
|
|
|
printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
|
|
"while accessing PCI MMIO space\n");
|
|
if (bus->power_warn_count <= 10) {
|
|
bus->power_warn_count++;
|
|
dump_stack();
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
#else /* DEBUG */
|
|
static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
|
|
{
|
|
struct ssb_bus *bus = dev->bus;
|
|
|
|
if (unlikely(ssb_pci_assert_buspower(bus)))
|
|
return 0xFF;
|
|
if (unlikely(bus->mapped_device != dev)) {
|
|
if (unlikely(ssb_pci_switch_core(bus, dev)))
|
|
return 0xFF;
|
|
}
|
|
return ioread8(bus->mmio + offset);
|
|
}
|
|
|
|
static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
|
|
{
|
|
struct ssb_bus *bus = dev->bus;
|
|
|
|
if (unlikely(ssb_pci_assert_buspower(bus)))
|
|
return 0xFFFF;
|
|
if (unlikely(bus->mapped_device != dev)) {
|
|
if (unlikely(ssb_pci_switch_core(bus, dev)))
|
|
return 0xFFFF;
|
|
}
|
|
return ioread16(bus->mmio + offset);
|
|
}
|
|
|
|
static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
|
|
{
|
|
struct ssb_bus *bus = dev->bus;
|
|
|
|
if (unlikely(ssb_pci_assert_buspower(bus)))
|
|
return 0xFFFFFFFF;
|
|
if (unlikely(bus->mapped_device != dev)) {
|
|
if (unlikely(ssb_pci_switch_core(bus, dev)))
|
|
return 0xFFFFFFFF;
|
|
}
|
|
return ioread32(bus->mmio + offset);
|
|
}
|
|
|
|
#ifdef CONFIG_SSB_BLOCKIO
|
|
static void ssb_pci_block_read(struct ssb_device *dev, void *buffer,
|
|
size_t count, u16 offset, u8 reg_width)
|
|
{
|
|
struct ssb_bus *bus = dev->bus;
|
|
void __iomem *addr = bus->mmio + offset;
|
|
|
|
if (unlikely(ssb_pci_assert_buspower(bus)))
|
|
goto error;
|
|
if (unlikely(bus->mapped_device != dev)) {
|
|
if (unlikely(ssb_pci_switch_core(bus, dev)))
|
|
goto error;
|
|
}
|
|
switch (reg_width) {
|
|
case sizeof(u8):
|
|
ioread8_rep(addr, buffer, count);
|
|
break;
|
|
case sizeof(u16):
|
|
SSB_WARN_ON(count & 1);
|
|
ioread16_rep(addr, buffer, count >> 1);
|
|
break;
|
|
case sizeof(u32):
|
|
SSB_WARN_ON(count & 3);
|
|
ioread32_rep(addr, buffer, count >> 2);
|
|
break;
|
|
default:
|
|
SSB_WARN_ON(1);
|
|
}
|
|
|
|
return;
|
|
error:
|
|
memset(buffer, 0xFF, count);
|
|
}
|
|
#endif /* CONFIG_SSB_BLOCKIO */
|
|
|
|
static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
|
|
{
|
|
struct ssb_bus *bus = dev->bus;
|
|
|
|
if (unlikely(ssb_pci_assert_buspower(bus)))
|
|
return;
|
|
if (unlikely(bus->mapped_device != dev)) {
|
|
if (unlikely(ssb_pci_switch_core(bus, dev)))
|
|
return;
|
|
}
|
|
iowrite8(value, bus->mmio + offset);
|
|
}
|
|
|
|
static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
|
|
{
|
|
struct ssb_bus *bus = dev->bus;
|
|
|
|
if (unlikely(ssb_pci_assert_buspower(bus)))
|
|
return;
|
|
if (unlikely(bus->mapped_device != dev)) {
|
|
if (unlikely(ssb_pci_switch_core(bus, dev)))
|
|
return;
|
|
}
|
|
iowrite16(value, bus->mmio + offset);
|
|
}
|
|
|
|
static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
|
|
{
|
|
struct ssb_bus *bus = dev->bus;
|
|
|
|
if (unlikely(ssb_pci_assert_buspower(bus)))
|
|
return;
|
|
if (unlikely(bus->mapped_device != dev)) {
|
|
if (unlikely(ssb_pci_switch_core(bus, dev)))
|
|
return;
|
|
}
|
|
iowrite32(value, bus->mmio + offset);
|
|
}
|
|
|
|
#ifdef CONFIG_SSB_BLOCKIO
|
|
static void ssb_pci_block_write(struct ssb_device *dev, const void *buffer,
|
|
size_t count, u16 offset, u8 reg_width)
|
|
{
|
|
struct ssb_bus *bus = dev->bus;
|
|
void __iomem *addr = bus->mmio + offset;
|
|
|
|
if (unlikely(ssb_pci_assert_buspower(bus)))
|
|
return;
|
|
if (unlikely(bus->mapped_device != dev)) {
|
|
if (unlikely(ssb_pci_switch_core(bus, dev)))
|
|
return;
|
|
}
|
|
switch (reg_width) {
|
|
case sizeof(u8):
|
|
iowrite8_rep(addr, buffer, count);
|
|
break;
|
|
case sizeof(u16):
|
|
SSB_WARN_ON(count & 1);
|
|
iowrite16_rep(addr, buffer, count >> 1);
|
|
break;
|
|
case sizeof(u32):
|
|
SSB_WARN_ON(count & 3);
|
|
iowrite32_rep(addr, buffer, count >> 2);
|
|
break;
|
|
default:
|
|
SSB_WARN_ON(1);
|
|
}
|
|
}
|
|
#endif /* CONFIG_SSB_BLOCKIO */
|
|
|
|
/* Not "static", as it's used in main.c */
|
|
const struct ssb_bus_ops ssb_pci_ops = {
|
|
.read8 = ssb_pci_read8,
|
|
.read16 = ssb_pci_read16,
|
|
.read32 = ssb_pci_read32,
|
|
.write8 = ssb_pci_write8,
|
|
.write16 = ssb_pci_write16,
|
|
.write32 = ssb_pci_write32,
|
|
#ifdef CONFIG_SSB_BLOCKIO
|
|
.block_read = ssb_pci_block_read,
|
|
.block_write = ssb_pci_block_write,
|
|
#endif
|
|
};
|
|
|
|
static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
|
|
struct ssb_bus *bus;
|
|
|
|
bus = ssb_pci_dev_to_bus(pdev);
|
|
if (!bus)
|
|
return -ENODEV;
|
|
|
|
return ssb_attr_sprom_show(bus, buf, sprom_do_read);
|
|
}
|
|
|
|
static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
|
|
struct ssb_bus *bus;
|
|
|
|
bus = ssb_pci_dev_to_bus(pdev);
|
|
if (!bus)
|
|
return -ENODEV;
|
|
|
|
return ssb_attr_sprom_store(bus, buf, count,
|
|
sprom_check_crc, sprom_do_write);
|
|
}
|
|
|
|
static DEVICE_ATTR(ssb_sprom, 0600,
|
|
ssb_pci_attr_sprom_show,
|
|
ssb_pci_attr_sprom_store);
|
|
|
|
void ssb_pci_exit(struct ssb_bus *bus)
|
|
{
|
|
struct pci_dev *pdev;
|
|
|
|
if (bus->bustype != SSB_BUSTYPE_PCI)
|
|
return;
|
|
|
|
pdev = bus->host_pci;
|
|
device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
|
|
}
|
|
|
|
int ssb_pci_init(struct ssb_bus *bus)
|
|
{
|
|
struct pci_dev *pdev;
|
|
int err;
|
|
|
|
if (bus->bustype != SSB_BUSTYPE_PCI)
|
|
return 0;
|
|
|
|
pdev = bus->host_pci;
|
|
mutex_init(&bus->sprom_mutex);
|
|
err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
|
|
if (err)
|
|
goto out;
|
|
|
|
out:
|
|
return err;
|
|
}
|