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arm: mvebu: a38x: serdes: Remove unused PCIe macros and functions

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Remove unused PCIe functions from SerDes code. They are unused and are
duplicated either from generic PCIe code or from pci_mvebu.c.

Remove also unused PCIe macros from SerDes code. They are just obfuscated
variants of standards macros in include/pci.h or in pci_mvebu.c.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2021-09-24 22:59:21 +02:00 • committed by Stefan Roese
parent 177ee6c77e
commit 28c935b5ee
2 changed files with 0 additions and 188 deletions
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128
arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.c
View file

@ -62,131 +62,3 @@ int hws_pex_config(const struct serdes_map *serdes_map, u8 count)
return MV_OK;
}
int pex_local_bus_num_set(u32 pex_if, u32 bus_num)
{
u32 pex_status;
DEBUG_INIT_FULL_S("\n### pex_local_bus_num_set ###\n");
if (bus_num >= MAX_PEX_BUSSES) {
DEBUG_INIT_C("pex_local_bus_num_set: Illegal bus number %d\n",
bus_num, 4);
return MV_BAD_PARAM;
}
pex_status = reg_read(PEX_STATUS_REG(pex_if));
pex_status &= ~PXSR_PEX_BUS_NUM_MASK;
pex_status |=
(bus_num << PXSR_PEX_BUS_NUM_OFFS) & PXSR_PEX_BUS_NUM_MASK;
reg_write(PEX_STATUS_REG(pex_if), pex_status);
return MV_OK;
}
int pex_local_dev_num_set(u32 pex_if, u32 dev_num)
{
u32 pex_status;
DEBUG_INIT_FULL_S("\n### pex_local_dev_num_set ###\n");
pex_status = reg_read(PEX_STATUS_REG(pex_if));
pex_status &= ~PXSR_PEX_DEV_NUM_MASK;
pex_status |=
(dev_num << PXSR_PEX_DEV_NUM_OFFS) & PXSR_PEX_DEV_NUM_MASK;
reg_write(PEX_STATUS_REG(pex_if), pex_status);
return MV_OK;
}
/*
* pex_config_read - Read from configuration space
*
* DESCRIPTION:
* This function performs a 32 bit read from PEX configuration space.
* It supports both type 0 and type 1 of Configuration Transactions
* (local and over bridge). In order to read from local bus segment, use
* bus number retrieved from pex_local_bus_num_get(). Other bus numbers
* will result configuration transaction of type 1 (over bridge).
*
* INPUT:
* pex_if - PEX interface number.
* bus - PEX segment bus number.
* dev - PEX device number.
* func - Function number.
* reg_offs - Register offset.
*
* OUTPUT:
* None.
*
* RETURN:
* 32bit register data, 0xffffffff on error
*/
u32 pex_config_read(u32 pex_if, u32 bus, u32 dev, u32 func, u32 reg_off)
{
u32 pex_data = 0;
u32 local_dev, local_bus;
u32 pex_status;
pex_status = reg_read(PEX_STATUS_REG(pex_if));
local_dev =
((pex_status & PXSR_PEX_DEV_NUM_MASK) >> PXSR_PEX_DEV_NUM_OFFS);
local_bus =
((pex_status & PXSR_PEX_BUS_NUM_MASK) >> PXSR_PEX_BUS_NUM_OFFS);
/*
* In PCI Express we have only one device number
* and this number is the first number we encounter
* else that the local_dev
* spec pex define return on config read/write on any device
*/
if (bus == local_bus) {
if (local_dev == 0) {
/*
* if local dev is 0 then the first number we encounter
* after 0 is 1
*/
if ((dev != 1) && (dev != local_dev))
return MV_ERROR;
} else {
/*
* if local dev is not 0 then the first number we
* encounter is 0
*/
if ((dev != 0) && (dev != local_dev))
return MV_ERROR;
}
}
/* Creating PEX address to be passed */
pex_data = (bus << PXCAR_BUS_NUM_OFFS);
pex_data |= (dev << PXCAR_DEVICE_NUM_OFFS);
pex_data |= (func << PXCAR_FUNC_NUM_OFFS);
/* Legacy register space */
pex_data |= (reg_off & PXCAR_REG_NUM_MASK);
/* Extended register space */
pex_data |= (((reg_off & PXCAR_REAL_EXT_REG_NUM_MASK) >>
PXCAR_REAL_EXT_REG_NUM_OFFS) << PXCAR_EXT_REG_NUM_OFFS);
pex_data |= PXCAR_CONFIG_EN;
/* Write the address to the PEX configuration address register */
reg_write(PEX_CFG_ADDR_REG(pex_if), pex_data);
/*
* In order to let the PEX controller absorbed the address
* of the read transaction we perform a validity check that
* the address was written
*/
if (pex_data != reg_read(PEX_CFG_ADDR_REG(pex_if)))
return MV_ERROR;
/* Cleaning Master Abort */
reg_bit_set(PEX_CFG_DIRECT_ACCESS(pex_if, PEX_STATUS_AND_COMMAND),
PXSAC_MABORT);
/* Read the Data returned in the PEX Data register */
pex_data = reg_read(PEX_CFG_DATA_REG(pex_if));
DEBUG_INIT_FULL_C(" --> ", pex_data, 4);
return pex_data;
}

60
arch/arm/mach-mvebu/serdes/a38x/ctrl_pex.h
View file

@ -12,28 +12,6 @@
/* Direct access to PEX0 Root Port's PCIe Capability structure */
#define PEX0_RP_PCIE_CFG_OFFSET (0x00080000 + 0x60)
/* Sample at Reset */
#define MPP_SAMPLE_AT_RESET(id) (0xe4200 + (id * 4))
/* PCI Express Control and Status Registers */
#define MAX_PEX_BUSSES 256
#define PEX_IF_REGS_OFFSET(if) ((if) > 0 ? \
(0x40000 + ((if) - 1) * 0x4000) : \
0x80000)
#define PEX_IF_REGS_BASE(if) (PEX_IF_REGS_OFFSET(if))
#define PEX_CAPABILITIES_REG(if) ((PEX_IF_REGS_BASE(if)) + 0x60)
#define PEX_LINK_CTRL_STATUS2_REG(if) ((PEX_IF_REGS_BASE(if)) + 0x90)
#define PEX_CTRL_REG(if) ((PEX_IF_REGS_BASE(if)) + 0x1a00)
#define PEX_STATUS_REG(if) ((PEX_IF_REGS_BASE(if)) + 0x1a04)
#define PEX_DBG_STATUS_REG(if) ((PEX_IF_REGS_BASE(if)) + 0x1a64)
#define PEX_LINK_CAPABILITY_REG 0x6c
#define PEX_LINK_CTRL_STAT_REG 0x70
#define PXSR_PEX_DEV_NUM_OFFS 16 /* Device Number Indication */
#define PXSR_PEX_DEV_NUM_MASK (0x1f << PXSR_PEX_DEV_NUM_OFFS)
#define PXSR_PEX_BUS_NUM_OFFS 8 /* Bus Number Indication */
#define PXSR_PEX_BUS_NUM_MASK (0xff << PXSR_PEX_BUS_NUM_OFFS)
/* PEX_CAPABILITIES_REG fields */
#define PCIE0_ENABLE_OFFS 0
#define PCIE0_ENABLE_MASK (0x1 << PCIE0_ENABLE_OFFS)
@ -44,45 +22,7 @@
#define PCIE3_ENABLE_OFFS 3
#define PCIE4_ENABLE_MASK (0x1 << PCIE3_ENABLE_OFFS)
/* Controller revision info */
#define PEX_DEVICE_AND_VENDOR_ID 0x000
#define PEX_CFG_DIRECT_ACCESS(if, reg) (PEX_IF_REGS_BASE(if) + (reg))
/* PCI Express Configuration Address Register */
#define PXCAR_REG_NUM_OFFS 2
#define PXCAR_REG_NUM_MAX 0x3f
#define PXCAR_REG_NUM_MASK (PXCAR_REG_NUM_MAX << \
PXCAR_REG_NUM_OFFS)
#define PXCAR_FUNC_NUM_OFFS 8
#define PXCAR_FUNC_NUM_MAX 0x7
#define PXCAR_FUNC_NUM_MASK (PXCAR_FUNC_NUM_MAX << \
PXCAR_FUNC_NUM_OFFS)
#define PXCAR_DEVICE_NUM_OFFS 11
#define PXCAR_DEVICE_NUM_MAX 0x1f
#define PXCAR_DEVICE_NUM_MASK (PXCAR_DEVICE_NUM_MAX << \
PXCAR_DEVICE_NUM_OFFS)
#define PXCAR_BUS_NUM_OFFS 16
#define PXCAR_BUS_NUM_MAX 0xff
#define PXCAR_BUS_NUM_MASK (PXCAR_BUS_NUM_MAX << \
PXCAR_BUS_NUM_OFFS)
#define PXCAR_EXT_REG_NUM_OFFS 24
#define PXCAR_EXT_REG_NUM_MAX 0xf
#define PEX_CFG_ADDR_REG(if) ((PEX_IF_REGS_BASE(if)) + 0x18f8)
#define PEX_CFG_DATA_REG(if) ((PEX_IF_REGS_BASE(if)) + 0x18fc)
#define PXCAR_REAL_EXT_REG_NUM_OFFS 8
#define PXCAR_REAL_EXT_REG_NUM_MASK (0xf << PXCAR_REAL_EXT_REG_NUM_OFFS)
#define PXCAR_CONFIG_EN BIT(31)
#define PEX_STATUS_AND_COMMAND 0x004
#define PXSAC_MABORT BIT(29) /* Recieved Master Abort */
int hws_pex_config(const struct serdes_map *serdes_map, u8 count);
int pex_local_bus_num_set(u32 pex_if, u32 bus_num);
int pex_local_dev_num_set(u32 pex_if, u32 dev_num);
u32 pex_config_read(u32 pex_if, u32 bus, u32 dev, u32 func, u32 reg_off);
void board_pex_config(void);
#endif