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/*
* arch/arm/mach-at91/include/mach/uncompress.h
*
* Copyright (C) 2003 SAN People
* Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.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 Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __ASM_ARCH_UNCOMPRESS_H
#define __ASM_ARCH_UNCOMPRESS_H
#include <linux/io.h>
#include <linux/atmel_serial.h>
#include <mach/hardware.h>
#include <mach/at91_dbgu.h>
#include <mach/cpu.h>
void __iomem *at91_uart;
static const u32 uarts_rm9200[] = {
AT91_BASE_DBGU0,
AT91RM9200_BASE_US0,
AT91RM9200_BASE_US1,
AT91RM9200_BASE_US2,
AT91RM9200_BASE_US3,
0,
};
static const u32 uarts_sam9260[] = {
AT91_BASE_DBGU0,
AT91SAM9260_BASE_US0,
AT91SAM9260_BASE_US1,
AT91SAM9260_BASE_US2,
AT91SAM9260_BASE_US3,
AT91SAM9260_BASE_US4,
AT91SAM9260_BASE_US5,
0,
};
static const u32 uarts_sam9261[] = {
AT91_BASE_DBGU0,
AT91SAM9261_BASE_US0,
AT91SAM9261_BASE_US1,
AT91SAM9261_BASE_US2,
0,
};
static const u32 uarts_sam9263[] = {
AT91_BASE_DBGU1,
AT91SAM9263_BASE_US0,
AT91SAM9263_BASE_US1,
AT91SAM9263_BASE_US2,
0,
};
static const u32 uarts_sam9g45[] = {
AT91_BASE_DBGU1,
AT91SAM9G45_BASE_US0,
AT91SAM9G45_BASE_US1,
AT91SAM9G45_BASE_US2,
AT91SAM9G45_BASE_US3,
0,
};
static const u32 uarts_sam9rl[] = {
AT91_BASE_DBGU0,
AT91SAM9RL_BASE_US0,
AT91SAM9RL_BASE_US1,
AT91SAM9RL_BASE_US2,
AT91SAM9RL_BASE_US3,
0,
};
static const u32 uarts_sam9x5[] = {
AT91_BASE_DBGU0,
AT91SAM9X5_BASE_USART0,
AT91SAM9X5_BASE_USART1,
AT91SAM9X5_BASE_USART2,
0,
};
static const u32 uarts_sama5d3[] = {
AT91_BASE_DBGU1,
SAMA5D3_BASE_USART0,
SAMA5D3_BASE_USART1,
SAMA5D3_BASE_USART2,
SAMA5D3_BASE_USART3,
0,
};
static const u32 uarts_sama5d4[] = {
AT91_BASE_DBGU2,
SAMA5D4_BASE_USART3,
0,
};
static inline const u32* decomp_soc_detect(void __iomem *dbgu_base)
{
u32 cidr, socid;
cidr = __raw_readl(dbgu_base + AT91_DBGU_CIDR);
socid = cidr & ~AT91_CIDR_VERSION;
switch (socid) {
case ARCH_ID_AT91RM9200:
return uarts_rm9200;
case ARCH_ID_AT91SAM9G20:
case ARCH_ID_AT91SAM9260:
return uarts_sam9260;
case ARCH_ID_AT91SAM9261:
return uarts_sam9261;
case ARCH_ID_AT91SAM9263:
return uarts_sam9263;
case ARCH_ID_AT91SAM9G45:
return uarts_sam9g45;
case ARCH_ID_AT91SAM9RL64:
return uarts_sam9rl;
case ARCH_ID_AT91SAM9N12:
case ARCH_ID_AT91SAM9X5:
return uarts_sam9x5;
case ARCH_ID_SAMA5:
cidr = __raw_readl(dbgu_base + AT91_DBGU_EXID);
if (cidr & ARCH_EXID_SAMA5D3)
return uarts_sama5d3;
else if (cidr & ARCH_EXID_SAMA5D4)
return uarts_sama5d4;
break;
}
/* at91sam9g10 */
if ((cidr & ~AT91_CIDR_EXT) == ARCH_ID_AT91SAM9G10) {
return uarts_sam9261;
}
/* at91sam9xe */
else if ((cidr & AT91_CIDR_ARCH) == ARCH_FAMILY_AT91SAM9XE) {
return uarts_sam9260;
}
return NULL;
}
static inline void arch_decomp_setup(void)
{
int i = 0;
const u32* usarts;
usarts = decomp_soc_detect((void __iomem *)AT91_BASE_DBGU0);
if (!usarts)
usarts = decomp_soc_detect((void __iomem *)AT91_BASE_DBGU1);
if (!usarts)
usarts = decomp_soc_detect((void __iomem *)AT91_BASE_DBGU2);
if (!usarts) {
at91_uart = NULL;
return;
}
do {
/* physical address */
at91_uart = (void __iomem *)usarts[i];
if (__raw_readl(at91_uart + ATMEL_US_BRGR))
return;
i++;
} while (usarts[i]);
at91_uart = NULL;
}
/*
* The following code assumes the serial port has already been
* initialized by the bootloader. If you didn't setup a port in
* your bootloader then nothing will appear (which might be desired).
*
* This does not append a newline
*/
static void putc(int c)
{
if (!at91_uart)
return;
while (!(__raw_readl(at91_uart + ATMEL_US_CSR) & ATMEL_US_TXRDY))
barrier();
__raw_writel(c, at91_uart + ATMEL_US_THR);
}
static inline void flush(void)
{
if (!at91_uart)
return;
/* wait for transmission to complete */
while (!(__raw_readl(at91_uart + ATMEL_US_CSR) & ATMEL_US_TXEMPTY))
barrier();
}
#endif
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