diff options
Diffstat (limited to 'arch/mips/pci/ops-pmcmsp.c')
| -rw-r--r-- | arch/mips/pci/ops-pmcmsp.c | 450 |
1 files changed, 225 insertions, 225 deletions
diff --git a/arch/mips/pci/ops-pmcmsp.c b/arch/mips/pci/ops-pmcmsp.c index 389bf669d56e..d0b6f8399b07 100644 --- a/arch/mips/pci/ops-pmcmsp.c +++ b/arch/mips/pci/ops-pmcmsp.c @@ -9,8 +9,8 @@ * Much of the code is derived from the original DDB5074 port by * Geert Uytterhoeven <geert@sonycom.com> * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the + * This program 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 2 of the License, or (at your * option) any later version. * @@ -57,18 +57,18 @@ static void pci_proc_init(void); * _________________________________________________________________________ * * DESCRIPTION: Prints the count of how many times each PCI - * interrupt has asserted. Can be invoked by the - * /proc filesystem. + * interrupt has asserted. Can be invoked by the + * /proc filesystem. * - * INPUTS: page - part of STDOUT calculation - * off - part of STDOUT calculation - * count - part of STDOUT calculation - * data - unused + * INPUTS: page - part of STDOUT calculation + * off - part of STDOUT calculation + * count - part of STDOUT calculation + * data - unused * - * OUTPUTS: start - new start location - * eof - end of file pointer + * OUTPUTS: start - new start location + * eof - end of file pointer * - * RETURNS: len - STDOUT length + * RETURNS: len - STDOUT length * ****************************************************************************/ static int read_msp_pci_counts(char *page, char **start, off_t off, @@ -106,21 +106,21 @@ static int read_msp_pci_counts(char *page, char **start, off_t off, * _________________________________________________________________________ * * DESCRIPTION: Generates a configuration write cycle for debug purposes. - * The IDSEL line asserted and location and data written are - * immaterial. Just want to be able to prove that a - * configuration write can be correctly generated on the - * PCI bus. Intent is that this function by invocable from - * the /proc filesystem. + * The IDSEL line asserted and location and data written are + * immaterial. Just want to be able to prove that a + * configuration write can be correctly generated on the + * PCI bus. Intent is that this function by invocable from + * the /proc filesystem. * - * INPUTS: page - part of STDOUT calculation - * off - part of STDOUT calculation - * count - part of STDOUT calculation - * data - unused + * INPUTS: page - part of STDOUT calculation + * off - part of STDOUT calculation + * count - part of STDOUT calculation + * data - unused * - * OUTPUTS: start - new start location - * eof - end of file pointer + * OUTPUTS: start - new start location + * eof - end of file pointer * - * RETURNS: len - STDOUT length + * RETURNS: len - STDOUT length * ****************************************************************************/ static int gen_pci_cfg_wr(char *page, char **start, off_t off, @@ -190,11 +190,11 @@ static int gen_pci_cfg_wr(char *page, char **start, off_t off, * * DESCRIPTION: Create entries in the /proc filesystem for debug access. * - * INPUTS: none + * INPUTS: none * - * OUTPUTS: none + * OUTPUTS: none * - * RETURNS: none + * RETURNS: none * ****************************************************************************/ static void pci_proc_init(void) @@ -214,44 +214,44 @@ static DEFINE_SPINLOCK(bpci_lock); * _________________________________________________________________________ * * DESCRIPTION: Defines the address range that pciauto() will use to - * assign to the I/O BARs of PCI devices. - * - * Use the start and end addresses of the MSP7120 PCI Host - * Controller I/O space, in the form that they appear on the - * PCI bus AFTER MSP7120 has performed address translation. - * - * For I/O accesses, MSP7120 ignores OATRAN and maps I/O - * accesses into the bottom 0xFFF region of address space, - * so that is the range to put into the pci_io_resource - * struct. - * - * In MSP4200, the start address was 0x04 instead of the - * expected 0x00. Will just assume there was a good reason - * for this! - * - * NOTES: Linux, by default, will assign I/O space to the lowest - * region of address space. Since MSP7120 and Linux, - * by default, have no offset in between how they map, the - * io_offset element of pci_controller struct should be set - * to zero. + * assign to the I/O BARs of PCI devices. + * + * Use the start and end addresses of the MSP7120 PCI Host + * Controller I/O space, in the form that they appear on the + * PCI bus AFTER MSP7120 has performed address translation. + * + * For I/O accesses, MSP7120 ignores OATRAN and maps I/O + * accesses into the bottom 0xFFF region of address space, + * so that is the range to put into the pci_io_resource + * struct. + * + * In MSP4200, the start address was 0x04 instead of the + * expected 0x00. Will just assume there was a good reason + * for this! + * + * NOTES: Linux, by default, will assign I/O space to the lowest + * region of address space. Since MSP7120 and Linux, + * by default, have no offset in between how they map, the + * io_offset element of pci_controller struct should be set + * to zero. * ELEMENTS: - * name - String used for a meaningful name. + * name - String used for a meaningful name. * - * start - Start address of MSP7120's I/O space, as MSP7120 presents - * the address on the PCI bus. + * start - Start address of MSP7120's I/O space, as MSP7120 presents + * the address on the PCI bus. * - * end - End address of MSP7120's I/O space, as MSP7120 presents - * the address on the PCI bus. + * end - End address of MSP7120's I/O space, as MSP7120 presents + * the address on the PCI bus. * - * flags - Attributes indicating the type of resource. In this case, - * indicate I/O space. + * flags - Attributes indicating the type of resource. In this case, + * indicate I/O space. * ****************************************************************************/ static struct resource pci_io_resource = { .name = "pci IO space", .start = 0x04, .end = 0x0FFF, - .flags = IORESOURCE_IO /* I/O space */ + .flags = IORESOURCE_IO /* I/O space */ }; /***************************************************************************** @@ -260,26 +260,26 @@ static struct resource pci_io_resource = { * _________________________________________________________________________ * * DESCRIPTION: Defines the address range that pciauto() will use to - * assign to the memory BARs of PCI devices. + * assign to the memory BARs of PCI devices. * - * The .start and .end values are dependent upon how address - * translation is performed by the OATRAN regiser. + * The .start and .end values are dependent upon how address + * translation is performed by the OATRAN regiser. * - * The values to use for .start and .end are the values - * in the form they appear on the PCI bus AFTER MSP7120 has - * performed OATRAN address translation. + * The values to use for .start and .end are the values + * in the form they appear on the PCI bus AFTER MSP7120 has + * performed OATRAN address translation. * * ELEMENTS: - * name - String used for a meaningful name. + * name - String used for a meaningful name. * - * start - Start address of MSP7120's memory space, as MSP7120 presents - * the address on the PCI bus. + * start - Start address of MSP7120's memory space, as MSP7120 presents + * the address on the PCI bus. * - * end - End address of MSP7120's memory space, as MSP7120 presents - * the address on the PCI bus. + * end - End address of MSP7120's memory space, as MSP7120 presents + * the address on the PCI bus. * - * flags - Attributes indicating the type of resource. In this case, - * indicate memory space. + * flags - Attributes indicating the type of resource. In this case, + * indicate memory space. * ****************************************************************************/ static struct resource pci_mem_resource = { @@ -295,17 +295,17 @@ static struct resource pci_mem_resource = { * _________________________________________________________________________ * * DESCRIPTION: PCI status interrupt handler. Updates the count of how - * many times each status bit has been set, then clears - * the status bits. If the appropriate macros are defined, - * these counts can be viewed via the /proc filesystem. + * many times each status bit has been set, then clears + * the status bits. If the appropriate macros are defined, + * these counts can be viewed via the /proc filesystem. * - * INPUTS: irq - unused - * dev_id - unused - * pt_regs - unused + * INPUTS: irq - unused + * dev_id - unused + * pt_regs - unused * - * OUTPUTS: none + * OUTPUTS: none * - * RETURNS: PCIBIOS_SUCCESSFUL - success + * RETURNS: PCIBIOS_SUCCESSFUL - success * ****************************************************************************/ static irqreturn_t bpci_interrupt(int irq, void *dev_id) @@ -335,41 +335,41 @@ static irqreturn_t bpci_interrupt(int irq, void *dev_id) * _________________________________________________________________________ * * DESCRIPTION: Performs a PCI configuration access (rd or wr), then - * checks that the access succeeded by querying MSP7120's - * PCI status bits. + * checks that the access succeeded by querying MSP7120's + * PCI status bits. * * INPUTS: - * access_type - kind of PCI configuration cycle to perform - * (read or write). Legal values are - * PCI_ACCESS_WRITE and PCI_ACCESS_READ. - * - * bus - pointer to the bus number of the device to - * be targeted for the configuration cycle. - * The only element of the pci_bus structure - * used is bus->number. This argument determines - * if the configuration access will be Type 0 or - * Type 1. Since MSP7120 assumes itself to be the - * PCI Host, any non-zero bus->number generates - * a Type 1 access. - * - * devfn - this is an 8-bit field. The lower three bits - * specify the function number of the device to - * be targeted for the configuration cycle, with - * all three-bit combinations being legal. The - * upper five bits specify the device number, - * with legal values being 10 to 31. - * - * where - address within the Configuration Header - * space to access. - * - * data - for write accesses, contains the data to - * write. + * access_type - kind of PCI configuration cycle to perform + * (read or write). Legal values are + * PCI_ACCESS_WRITE and PCI_ACCESS_READ. + * + * bus - pointer to the bus number of the device to + * be targeted for the configuration cycle. + * The only element of the pci_bus structure + * used is bus->number. This argument determines + * if the configuration access will be Type 0 or + * Type 1. Since MSP7120 assumes itself to be the + * PCI Host, any non-zero bus->number generates + * a Type 1 access. + * + * devfn - this is an 8-bit field. The lower three bits + * specify the function number of the device to + * be targeted for the configuration cycle, with + * all three-bit combinations being legal. The + * upper five bits specify the device number, + * with legal values being 10 to 31. + * + * where - address within the Configuration Header + * space to access. + * + * data - for write accesses, contains the data to + * write. * * OUTPUTS: - * data - for read accesses, contains the value read. + * data - for read accesses, contains the value read. * - * RETURNS: PCIBIOS_SUCCESSFUL - success - * -1 - access failure + * RETURNS: PCIBIOS_SUCCESSFUL - success + * -1 - access failure * ****************************************************************************/ int msp_pcibios_config_access(unsigned char access_type, @@ -429,7 +429,7 @@ int msp_pcibios_config_access(unsigned char access_type, * for this Block Copy, called Block Copy 0 Fault (BC0F) and * Block Copy 1 Fault (BC1F). MSP4200 and MSP7120 don't have this * dedicated Block Copy block, so these two interrupts are now - * marked reserved. In case the Block Copy is resurrected in a + * marked reserved. In case the Block Copy is resurrected in a * future design, maintain the code that treats these two interrupts * specially. * @@ -439,7 +439,7 @@ int msp_pcibios_config_access(unsigned char access_type, preg->if_status = ~(BPCI_IFSTATUS_BC0F | BPCI_IFSTATUS_BC1F); /* Setup address that is to appear on PCI bus */ - preg->config_addr = BPCI_CFGADDR_ENABLE | + preg->config_addr = BPCI_CFGADDR_ENABLE | (bus_num << BPCI_CFGADDR_BUSNUM_SHF) | (dev_fn << BPCI_CFGADDR_FUNCTNUM_SHF) | (where & 0xFC); @@ -494,21 +494,21 @@ int msp_pcibios_config_access(unsigned char access_type, * _________________________________________________________________________ * * DESCRIPTION: Read a byte from PCI configuration address spac - * Since the hardware can't address 8 bit chunks - * directly, read a 32-bit chunk, then mask off extraneous - * bits. + * Since the hardware can't address 8 bit chunks + * directly, read a 32-bit chunk, then mask off extraneous + * bits. * - * INPUTS bus - structure containing attributes for the PCI bus - * that the read is destined for. - * devfn - device/function combination that the read is - * destined for. - * where - register within the Configuration Header space - * to access. + * INPUTS bus - structure containing attributes for the PCI bus + * that the read is destined for. + * devfn - device/function combination that the read is + * destined for. + * where - register within the Configuration Header space + * to access. * - * OUTPUTS val - read data + * OUTPUTS val - read data * - * RETURNS: PCIBIOS_SUCCESSFUL - success - * -1 - read access failure + * RETURNS: PCIBIOS_SUCCESSFUL - success + * -1 - read access failure * ****************************************************************************/ static int @@ -541,22 +541,22 @@ msp_pcibios_read_config_byte(struct pci_bus *bus, * _________________________________________________________________________ * * DESCRIPTION: Read a word (16 bits) from PCI configuration address space. - * Since the hardware can't address 16 bit chunks - * directly, read a 32-bit chunk, then mask off extraneous - * bits. + * Since the hardware can't address 16 bit chunks + * directly, read a 32-bit chunk, then mask off extraneous + * bits. * - * INPUTS bus - structure containing attributes for the PCI bus - * that the read is destined for. - * devfn - device/function combination that the read is - * destined for. - * where - register within the Configuration Header space - * to access. + * INPUTS bus - structure containing attributes for the PCI bus + * that the read is destined for. + * devfn - device/function combination that the read is + * destined for. + * where - register within the Configuration Header space + * to access. * - * OUTPUTS val - read data + * OUTPUTS val - read data * - * RETURNS: PCIBIOS_SUCCESSFUL - success - * PCIBIOS_BAD_REGISTER_NUMBER - bad register address - * -1 - read access failure + * RETURNS: PCIBIOS_SUCCESSFUL - success + * PCIBIOS_BAD_REGISTER_NUMBER - bad register address + * -1 - read access failure * ****************************************************************************/ static int @@ -600,20 +600,20 @@ msp_pcibios_read_config_word(struct pci_bus *bus, * _________________________________________________________________________ * * DESCRIPTION: Read a double word (32 bits) from PCI configuration - * address space. + * address space. * - * INPUTS bus - structure containing attributes for the PCI bus - * that the read is destined for. - * devfn - device/function combination that the read is - * destined for. - * where - register within the Configuration Header space - * to access. + * INPUTS bus - structure containing attributes for the PCI bus + * that the read is destined for. + * devfn - device/function combination that the read is + * destined for. + * where - register within the Configuration Header space + * to access. * - * OUTPUTS val - read data + * OUTPUTS val - read data * - * RETURNS: PCIBIOS_SUCCESSFUL - success - * PCIBIOS_BAD_REGISTER_NUMBER - bad register address - * -1 - read access failure + * RETURNS: PCIBIOS_SUCCESSFUL - success + * PCIBIOS_BAD_REGISTER_NUMBER - bad register address + * -1 - read access failure * ****************************************************************************/ static int @@ -652,21 +652,21 @@ msp_pcibios_read_config_dword(struct pci_bus *bus, * _________________________________________________________________________ * * DESCRIPTION: Write a byte to PCI configuration address space. - * Since the hardware can't address 8 bit chunks - * directly, a read-modify-write is performed. + * Since the hardware can't address 8 bit chunks + * directly, a read-modify-write is performed. * - * INPUTS bus - structure containing attributes for the PCI bus - * that the write is destined for. - * devfn - device/function combination that the write is - * destined for. - * where - register within the Configuration Header space - * to access. - * val - value to write + * INPUTS bus - structure containing attributes for the PCI bus + * that the write is destined for. + * devfn - device/function combination that the write is + * destined for. + * where - register within the Configuration Header space + * to access. + * val - value to write * - * OUTPUTS none + * OUTPUTS none * - * RETURNS: PCIBIOS_SUCCESSFUL - success - * -1 - write access failure + * RETURNS: PCIBIOS_SUCCESSFUL - success + * -1 - write access failure * ****************************************************************************/ static int @@ -700,22 +700,22 @@ msp_pcibios_write_config_byte(struct pci_bus *bus, * _________________________________________________________________________ * * DESCRIPTION: Write a word (16-bits) to PCI configuration address space. - * Since the hardware can't address 16 bit chunks - * directly, a read-modify-write is performed. + * Since the hardware can't address 16 bit chunks + * directly, a read-modify-write is performed. * - * INPUTS bus - structure containing attributes for the PCI bus - * that the write is destined for. - * devfn - device/function combination that the write is - * destined for. - * where - register within the Configuration Header space - * to access. - * val - value to write + * INPUTS bus - structure containing attributes for the PCI bus + * that the write is destined for. + * devfn - device/function combination that the write is + * destined for. + * where - register within the Configuration Header space + * to access. + * val - value to write * - * OUTPUTS none + * OUTPUTS none * - * RETURNS: PCIBIOS_SUCCESSFUL - success - * PCIBIOS_BAD_REGISTER_NUMBER - bad register address - * -1 - write access failure + * RETURNS: PCIBIOS_SUCCESSFUL - success + * PCIBIOS_BAD_REGISTER_NUMBER - bad register address + * -1 - write access failure * ****************************************************************************/ static int @@ -753,21 +753,21 @@ msp_pcibios_write_config_word(struct pci_bus *bus, * _________________________________________________________________________ * * DESCRIPTION: Write a double word (32-bits) to PCI configuration address - * space. + * space. * - * INPUTS bus - structure containing attributes for the PCI bus - * that the write is destined for. - * devfn - device/function combination that the write is - * destined for. - * where - register within the Configuration Header space - * to access. - * val - value to write + * INPUTS bus - structure containing attributes for the PCI bus + * that the write is destined for. + * devfn - device/function combination that the write is + * destined for. + * where - register within the Configuration Header space + * to access. + * val - value to write * - * OUTPUTS none + * OUTPUTS none * - * RETURNS: PCIBIOS_SUCCESSFUL - success - * PCIBIOS_BAD_REGISTER_NUMBER - bad register address - * -1 - write access failure + * RETURNS: PCIBIOS_SUCCESSFUL - success + * PCIBIOS_BAD_REGISTER_NUMBER - bad register address + * -1 - write access failure * ****************************************************************************/ static int @@ -794,22 +794,22 @@ msp_pcibios_write_config_dword(struct pci_bus *bus, * _________________________________________________________________________ * * DESCRIPTION: Interface the PCI configuration read request with - * the appropriate function, based on how many bytes - * the read request is. + * the appropriate function, based on how many bytes + * the read request is. * - * INPUTS bus - structure containing attributes for the PCI bus - * that the write is destined for. - * devfn - device/function combination that the write is - * destined for. - * where - register within the Configuration Header space - * to access. - * size - in units of bytes, should be 1, 2, or 4. + * INPUTS bus - structure containing attributes for the PCI bus + * that the write is destined for. + * devfn - device/function combination that the write is + * destined for. + * where - register within the Configuration Header space + * to access. + * size - in units of bytes, should be 1, 2, or 4. * - * OUTPUTS val - value read, with any extraneous bytes masked - * to zero. + * OUTPUTS val - value read, with any extraneous bytes masked + * to zero. * - * RETURNS: PCIBIOS_SUCCESSFUL - success - * -1 - failure + * RETURNS: PCIBIOS_SUCCESSFUL - success + * -1 - failure * ****************************************************************************/ int @@ -845,22 +845,22 @@ msp_pcibios_read_config(struct pci_bus *bus, * _________________________________________________________________________ * * DESCRIPTION: Interface the PCI configuration write request with - * the appropriate function, based on how many bytes - * the read request is. + * the appropriate function, based on how many bytes + * the read request is. * - * INPUTS bus - structure containing attributes for the PCI bus - * that the write is destined for. - * devfn - device/function combination that the write is - * destined for. - * where - register within the Configuration Header space - * to access. - * size - in units of bytes, should be 1, 2, or 4. - * val - value to write + * INPUTS bus - structure containing attributes for the PCI bus + * that the write is destined for. + * devfn - device/function combination that the write is + * destined for. + * where - register within the Configuration Header space + * to access. + * size - in units of bytes, should be 1, 2, or 4. + * val - value to write * - * OUTPUTS: none + * OUTPUTS: none * - * RETURNS: PCIBIOS_SUCCESSFUL - success - * -1 - failure + * RETURNS: PCIBIOS_SUCCESSFUL - success + * -1 - failure * ****************************************************************************/ int @@ -897,11 +897,11 @@ msp_pcibios_write_config(struct pci_bus *bus, * _________________________________________________________________________ * * DESCRIPTION: structure to abstract the hardware specific PCI - * configuration accesses. + * configuration accesses. * * ELEMENTS: - * read - function for Linux to generate PCI Configuration reads. - * write - function for Linux to generate PCI Configuration writes. + * read - function for Linux to generate PCI Configuration reads. + * write - function for Linux to generate PCI Configuration writes. * ****************************************************************************/ struct pci_ops msp_pci_ops = { @@ -917,27 +917,27 @@ struct pci_ops msp_pci_ops = { * Describes the attributes of the MSP7120 PCI Host Controller * * ELEMENTS: - * pci_ops - abstracts the hardware specific PCI configuration - * accesses. + * pci_ops - abstracts the hardware specific PCI configuration + * accesses. * * mem_resource - address range pciauto() uses to assign to PCI device - * memory BARs. + * memory BARs. * * mem_offset - offset between how MSP7120 outbound PCI memory - * transaction addresses appear on the PCI bus and how Linux - * wants to configure memory BARs of the PCI devices. - * MSP7120 does nothing funky, so just set to zero. + * transaction addresses appear on the PCI bus and how Linux + * wants to configure memory BARs of the PCI devices. + * MSP7120 does nothing funky, so just set to zero. * * io_resource - address range pciauto() uses to assign to PCI device - * I/O BARs. + * I/O BARs. * - * io_offset - offset between how MSP7120 outbound PCI I/O - * transaction addresses appear on the PCI bus and how - * Linux defaults to configure I/O BARs of the PCI devices. - * MSP7120 maps outbound I/O accesses into the bottom - * bottom 4K of PCI address space (and ignores OATRAN). - * Since the Linux default is to configure I/O BARs to the - * bottom 4K, no special offset is needed. Just set to zero. + * io_offset - offset between how MSP7120 outbound PCI I/O + * transaction addresses appear on the PCI bus and how + * Linux defaults to configure I/O BARs of the PCI devices. + * MSP7120 maps outbound I/O accesses into the bottom + * bottom 4K of PCI address space (and ignores OATRAN). + * Since the Linux default is to configure I/O BARs to the + * bottom 4K, no special offset is needed. Just set to zero. * ****************************************************************************/ static struct pci_controller msp_pci_controller = { @@ -955,7 +955,7 @@ static struct pci_controller msp_pci_controller = { * _________________________________________________________________________ * * DESCRIPTION: Initialize the PCI Host Controller and register it with - * Linux so Linux can seize control of the PCI bus. + * Linux so Linux can seize control of the PCI bus. * ****************************************************************************/ void __init msp_pci_init(void) @@ -979,7 +979,7 @@ void __init msp_pci_init(void) *(unsigned long *)QFLUSH_REG_1 = 3; /* Configure PCI Host Controller. */ - preg->if_status = ~0; /* Clear cause register bits */ + preg->if_status = ~0; /* Clear cause register bits */ preg->config_addr = 0; /* Clear config access */ preg->oatran = MSP_PCI_OATRAN; /* PCI outbound addr translation */ preg->if_mask = 0xF8BF87C0; /* Enable all PCI status interrupts */ |