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linux-sg2042/arch/arm/mach-davinci/common.c

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davinci: Encapsulate SoC-specific data in a structure Create a structure to encapsulate SoC-specific information. This will assist in generalizing code so it can be used by different SoCs that have similar hardware but with minor differences such as having a different base address. The idea is that the code for each SoC fills out a structure with the correct information. The board-specific code then calls the SoC init routine which in turn will call a common init routine that makes a copy of the structure, maps in I/O regions, etc. After initialization, code can get a pointer to the structure by calling davinci_get_soc_info(). Eventually, the common init routine will make a copy of all of the data pointed to by the structure so the original data can be made __init_data. That way the data for SoC's that aren't being used won't consume memory for the entire life of the kernel. The structure will be extended in subsequent patches but initially, it holds the map_desc structure for any I/O regions the SoC/board wants statically mapped. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:38:58 +08:00
/*
* Code commons to all DaVinci SoCs.
*
* Author: Mark A. Greer <mgreer@mvista.com>
*
* 2009 (c) MontaVista Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/module.h>
#include <linux/io.h>
davinci: Factor out emac mac address handling Factor out the code to extract that mac address from i2c eeprom. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:41:27 +08:00
#include <linux/etherdevice.h>
TI Davinci EMAC : Re-use driver for other platforms. The davinci EMAC peripheral is also available on other TI platforms -notably TI AM3517 SoC. This patch modifies the config option and the platform structure header files so that the driver can be reused on non-davinci platforms as well. Signed-off-by: Sriramakrishnan <srk@ti.com> Acked-by: Chaithrika U S <chaithrika@ti.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-19 18:28:25 +08:00
#include <linux/davinci_emac.h>
ARM: mach-davinci: Setup consistent dma size at boot time Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> CC: Sekhar Nori <nsekhar@ti.com> CC: Kevin Hilman <khilman@ti.com>
2011-08-04 21:51:45 +08:00
#include <linux/dma-mapping.h>
davinci: Encapsulate SoC-specific data in a structure Create a structure to encapsulate SoC-specific information. This will assist in generalizing code so it can be used by different SoCs that have similar hardware but with minor differences such as having a different base address. The idea is that the code for each SoC fills out a structure with the correct information. The board-specific code then calls the SoC init routine which in turn will call a common init routine that makes a copy of the structure, maps in I/O regions, etc. After initialization, code can get a pointer to the structure by calling davinci_get_soc_info(). Eventually, the common init routine will make a copy of all of the data pointed to by the structure so the original data can be made __init_data. That way the data for SoC's that aren't being used won't consume memory for the entire life of the kernel. The structure will be extended in subsequent patches but initially, it holds the map_desc structure for any I/O regions the SoC/board wants statically mapped. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:38:58 +08:00
#include <asm/tlb.h>
#include <asm/mach/map.h>
#include <mach/common.h>
davinci: Support JTAG ID register at any address The Davinci cpu_is_davinci_*() macros use the SoC part number and variant retrieved from the JTAG ID register to determine the type of cpu that the kernel is running on. Currently, the code to read the JTAG ID register assumes that the register is always at the same base address. This isn't true on some newer SoCs. To solve this, have the SoC-specific code set the JTAG ID register base address in soc_info structure and add a 'cpu_id' member to it. 'cpu_id' will be used by the cpu_is_davinci_*() macros to match the cpu id. Also move the info used to identify the cpu type into the SoC-specific code to keep all SoC-specific code together. The common code will read the JTAG ID register, search through an array of davinci_id structures to identify the cpu type. Once identified, it will set the 'cpu_id' member of the soc_info structure to the proper value and the cpu_is_davinci_*() macros will now work. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:39:09 +08:00
#include <mach/cputype.h>
davinci: Encapsulate SoC-specific data in a structure Create a structure to encapsulate SoC-specific information. This will assist in generalizing code so it can be used by different SoCs that have similar hardware but with minor differences such as having a different base address. The idea is that the code for each SoC fills out a structure with the correct information. The board-specific code then calls the SoC init routine which in turn will call a common init routine that makes a copy of the structure, maps in I/O regions, etc. After initialization, code can get a pointer to the structure by calling davinci_get_soc_info(). Eventually, the common init routine will make a copy of all of the data pointed to by the structure so the original data can be made __init_data. That way the data for SoC's that aren't being used won't consume memory for the entire life of the kernel. The structure will be extended in subsequent patches but initially, it holds the map_desc structure for any I/O regions the SoC/board wants statically mapped. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:38:58 +08:00
struct davinci_soc_info davinci_soc_info;
EXPORT_SYMBOL(davinci_soc_info);
Davinci: jtag_id - use ioremap() This patch replaces the jtag id base info in davinci_soc_info with a physical address which is then ioremap()ed within common code. This patch (in combination with a similar change for PSC) will allow us to eliminate the SYSCFG nastiness in DA8xx code. Signed-off-by: Cyril Chemparathy <cyril@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-08 05:06:34 +08:00
static int __init davinci_init_id(struct davinci_soc_info *soc_info)
davinci: Support JTAG ID register at any address The Davinci cpu_is_davinci_*() macros use the SoC part number and variant retrieved from the JTAG ID register to determine the type of cpu that the kernel is running on. Currently, the code to read the JTAG ID register assumes that the register is always at the same base address. This isn't true on some newer SoCs. To solve this, have the SoC-specific code set the JTAG ID register base address in soc_info structure and add a 'cpu_id' member to it. 'cpu_id' will be used by the cpu_is_davinci_*() macros to match the cpu id. Also move the info used to identify the cpu type into the SoC-specific code to keep all SoC-specific code together. The common code will read the JTAG ID register, search through an array of davinci_id structures to identify the cpu type. Once identified, it will set the 'cpu_id' member of the soc_info structure to the proper value and the cpu_is_davinci_*() macros will now work. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:39:09 +08:00
{
Davinci: jtag_id - use ioremap() This patch replaces the jtag id base info in davinci_soc_info with a physical address which is then ioremap()ed within common code. This patch (in combination with a similar change for PSC) will allow us to eliminate the SYSCFG nastiness in DA8xx code. Signed-off-by: Cyril Chemparathy <cyril@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-08 05:06:34 +08:00
int i;
struct davinci_id *dip;
u8 variant;
u16 part_no;
void __iomem *base;
base = ioremap(soc_info->jtag_id_reg, SZ_4K);
if (!base) {
pr_err("Unable to map JTAG ID register\n");
return -ENOMEM;
}
soc_info->jtag_id = __raw_readl(base);
iounmap(base);
davinci: Support JTAG ID register at any address The Davinci cpu_is_davinci_*() macros use the SoC part number and variant retrieved from the JTAG ID register to determine the type of cpu that the kernel is running on. Currently, the code to read the JTAG ID register assumes that the register is always at the same base address. This isn't true on some newer SoCs. To solve this, have the SoC-specific code set the JTAG ID register base address in soc_info structure and add a 'cpu_id' member to it. 'cpu_id' will be used by the cpu_is_davinci_*() macros to match the cpu id. Also move the info used to identify the cpu type into the SoC-specific code to keep all SoC-specific code together. The common code will read the JTAG ID register, search through an array of davinci_id structures to identify the cpu type. Once identified, it will set the 'cpu_id' member of the soc_info structure to the proper value and the cpu_is_davinci_*() macros will now work. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:39:09 +08:00
Davinci: jtag_id - use ioremap() This patch replaces the jtag id base info in davinci_soc_info with a physical address which is then ioremap()ed within common code. This patch (in combination with a similar change for PSC) will allow us to eliminate the SYSCFG nastiness in DA8xx code. Signed-off-by: Cyril Chemparathy <cyril@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-08 05:06:34 +08:00
variant = (soc_info->jtag_id & 0xf0000000) >> 28;
part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
davinci: Support JTAG ID register at any address The Davinci cpu_is_davinci_*() macros use the SoC part number and variant retrieved from the JTAG ID register to determine the type of cpu that the kernel is running on. Currently, the code to read the JTAG ID register assumes that the register is always at the same base address. This isn't true on some newer SoCs. To solve this, have the SoC-specific code set the JTAG ID register base address in soc_info structure and add a 'cpu_id' member to it. 'cpu_id' will be used by the cpu_is_davinci_*() macros to match the cpu id. Also move the info used to identify the cpu type into the SoC-specific code to keep all SoC-specific code together. The common code will read the JTAG ID register, search through an array of davinci_id structures to identify the cpu type. Once identified, it will set the 'cpu_id' member of the soc_info structure to the proper value and the cpu_is_davinci_*() macros will now work. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:39:09 +08:00
i++, dip++)
/* Don't care about the manufacturer right now */
Davinci: jtag_id - use ioremap() This patch replaces the jtag id base info in davinci_soc_info with a physical address which is then ioremap()ed within common code. This patch (in combination with a similar change for PSC) will allow us to eliminate the SYSCFG nastiness in DA8xx code. Signed-off-by: Cyril Chemparathy <cyril@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-08 05:06:34 +08:00
if ((dip->part_no == part_no) && (dip->variant == variant)) {
soc_info->cpu_id = dip->cpu_id;
pr_info("DaVinci %s variant 0x%x\n", dip->name,
dip->variant);
return 0;
}
pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
return -EINVAL;
davinci: Support JTAG ID register at any address The Davinci cpu_is_davinci_*() macros use the SoC part number and variant retrieved from the JTAG ID register to determine the type of cpu that the kernel is running on. Currently, the code to read the JTAG ID register assumes that the register is always at the same base address. This isn't true on some newer SoCs. To solve this, have the SoC-specific code set the JTAG ID register base address in soc_info structure and add a 'cpu_id' member to it. 'cpu_id' will be used by the cpu_is_davinci_*() macros to match the cpu id. Also move the info used to identify the cpu type into the SoC-specific code to keep all SoC-specific code together. The common code will read the JTAG ID register, search through an array of davinci_id structures to identify the cpu type. Once identified, it will set the 'cpu_id' member of the soc_info structure to the proper value and the cpu_is_davinci_*() macros will now work. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:39:09 +08:00
}
ARM: davinci: make argument to davinci_common_init() as const Make the function argument of the function davinci_common_init as const as it's memory contents are only copied during a memcpy call. So, the fields of the structure to which the argument soc_info points to never gets modified and therefore the argument can be made const. Add const to the prototype too. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2017-10-16 18:08:23 +08:00
void __init davinci_common_init(const struct davinci_soc_info *soc_info)
davinci: Encapsulate SoC-specific data in a structure Create a structure to encapsulate SoC-specific information. This will assist in generalizing code so it can be used by different SoCs that have similar hardware but with minor differences such as having a different base address. The idea is that the code for each SoC fills out a structure with the correct information. The board-specific code then calls the SoC init routine which in turn will call a common init routine that makes a copy of the structure, maps in I/O regions, etc. After initialization, code can get a pointer to the structure by calling davinci_get_soc_info(). Eventually, the common init routine will make a copy of all of the data pointed to by the structure so the original data can be made __init_data. That way the data for SoC's that aren't being used won't consume memory for the entire life of the kernel. The structure will be extended in subsequent patches but initially, it holds the map_desc structure for any I/O regions the SoC/board wants statically mapped. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:38:58 +08:00
{
int ret;
if (!soc_info) {
ret = -EINVAL;
goto err;
}
memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
iotable_init(davinci_soc_info.io_desc,
davinci_soc_info.io_desc_num);
/*
* Normally devicemaps_init() would flush caches and tlb after
* mdesc->map_io(), but we must also do it here because of the CPU
* revision check below.
*/
local_flush_tlb_all();
flush_cache_all();
/*
* We want to check CPU revision early for cpu_is_xxxx() macros.
* IO space mapping must be initialized before we can do that.
*/
Davinci: jtag_id - use ioremap() This patch replaces the jtag id base info in davinci_soc_info with a physical address which is then ioremap()ed within common code. This patch (in combination with a similar change for PSC) will allow us to eliminate the SYSCFG nastiness in DA8xx code. Signed-off-by: Cyril Chemparathy <cyril@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-08 05:06:34 +08:00
ret = davinci_init_id(&davinci_soc_info);
if (ret < 0)
davinci: Support JTAG ID register at any address The Davinci cpu_is_davinci_*() macros use the SoC part number and variant retrieved from the JTAG ID register to determine the type of cpu that the kernel is running on. Currently, the code to read the JTAG ID register assumes that the register is always at the same base address. This isn't true on some newer SoCs. To solve this, have the SoC-specific code set the JTAG ID register base address in soc_info structure and add a 'cpu_id' member to it. 'cpu_id' will be used by the cpu_is_davinci_*() macros to match the cpu id. Also move the info used to identify the cpu type into the SoC-specific code to keep all SoC-specific code together. The common code will read the JTAG ID register, search through an array of davinci_id structures to identify the cpu type. Once identified, it will set the 'cpu_id' member of the soc_info structure to the proper value and the cpu_is_davinci_*() macros will now work. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:39:09 +08:00
goto err;
davinci: Encapsulate SoC-specific data in a structure Create a structure to encapsulate SoC-specific information. This will assist in generalizing code so it can be used by different SoCs that have similar hardware but with minor differences such as having a different base address. The idea is that the code for each SoC fills out a structure with the correct information. The board-specific code then calls the SoC init routine which in turn will call a common init routine that makes a copy of the structure, maps in I/O regions, etc. After initialization, code can get a pointer to the structure by calling davinci_get_soc_info(). Eventually, the common init routine will make a copy of all of the data pointed to by the structure so the original data can be made __init_data. That way the data for SoC's that aren't being used won't consume memory for the entire life of the kernel. The structure will be extended in subsequent patches but initially, it holds the map_desc structure for any I/O regions the SoC/board wants statically mapped. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:38:58 +08:00
davinci: Add clock init call to common init routine All of the davinci SoCs need to call davinci_clk_init() so put the call in the common init routine. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:39:23 +08:00
davinci: Encapsulate SoC-specific data in a structure Create a structure to encapsulate SoC-specific information. This will assist in generalizing code so it can be used by different SoCs that have similar hardware but with minor differences such as having a different base address. The idea is that the code for each SoC fills out a structure with the correct information. The board-specific code then calls the SoC init routine which in turn will call a common init routine that makes a copy of the structure, maps in I/O regions, etc. After initialization, code can get a pointer to the structure by calling davinci_get_soc_info(). Eventually, the common init routine will make a copy of all of the data pointed to by the structure so the original data can be made __init_data. That way the data for SoC's that aren't being used won't consume memory for the entire life of the kernel. The structure will be extended in subsequent patches but initially, it holds the map_desc structure for any I/O regions the SoC/board wants statically mapped. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:38:58 +08:00
return;
err:
davinci: make it easier to identify SoC init failures This patch makes it easier to identify SoC init failures by panicing when SoC init fails. Without successful SoC init, the kernel eventually fails when attempt is made to access the clocks. Also, an error is printed when JTAG ID match fails to make it easier to identify failures due to SoC rev changes. Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-10-01 15:11:06 +08:00
panic("davinci_common_init: SoC Initialization failed\n");
davinci: Encapsulate SoC-specific data in a structure Create a structure to encapsulate SoC-specific information. This will assist in generalizing code so it can be used by different SoCs that have similar hardware but with minor differences such as having a different base address. The idea is that the code for each SoC fills out a structure with the correct information. The board-specific code then calls the SoC init routine which in turn will call a common init routine that makes a copy of the structure, maps in I/O regions, etc. After initialization, code can get a pointer to the structure by calling davinci_get_soc_info(). Eventually, the common init routine will make a copy of all of the data pointed to by the structure so the original data can be made __init_data. That way the data for SoC's that aren't being used won't consume memory for the entire life of the kernel. The structure will be extended in subsequent patches but initially, it holds the map_desc structure for any I/O regions the SoC/board wants statically mapped. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-04-16 03:38:58 +08:00
}
ARM: davinci: use machine specific hook for late init Cc: Kevin Hilman <khilman@ti.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Sekhar Nori <nsekhar@ti.com>
2012-04-26 09:45:39 +08:00
void __init davinci_init_late(void)
{
davinci_cpufreq_init();
}