7be90a6ba9
The AT91CAP9 revC CPU has a few differences over the previous, revB CPU which was distributed in small quantities only (revA was an internal Atmel product only). This patch adds the detection routines to recognize the different AT91CAP9 revisions (based on the PMC subsystem version number), and uses them to: - activate a workaround for the external interrupts levels (on revB CPUs) - set the UDPHS_BYPASS bit (on revB CPUs) - set AT91_GPBR register address to the correct offset (0xfffffd50 on revB, 0xfffffd60 on revC) For debugging usage, the CPU revision can be found in /proc/cpuinfo on the 'Revision' line. This patch is extracted from Andrew Victor's -at91 patch (2.6.27-at91.patch) where it has been tested for the last 6 months. Signed-off-by: Stelian Pop <stelian@popies.net> Signed-off-by: Andrew Victor <linux@maxim.org.za> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
119 lines
5.9 KiB
C
119 lines
5.9 KiB
C
/*
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* arch/arm/mach-at91/include/mach/at91_pmc.h
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*
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* Copyright (C) 2005 Ivan Kokshaysky
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* Copyright (C) SAN People
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*
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* Power Management Controller (PMC) - System peripherals registers.
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* Based on AT91RM9200 datasheet revision E.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef AT91_PMC_H
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#define AT91_PMC_H
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#define AT91_PMC_SCER (AT91_PMC + 0x00) /* System Clock Enable Register */
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#define AT91_PMC_SCDR (AT91_PMC + 0x04) /* System Clock Disable Register */
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#define AT91_PMC_SCSR (AT91_PMC + 0x08) /* System Clock Status Register */
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#define AT91_PMC_PCK (1 << 0) /* Processor Clock */
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#define AT91RM9200_PMC_UDP (1 << 1) /* USB Devcice Port Clock [AT91RM9200 only] */
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#define AT91RM9200_PMC_MCKUDP (1 << 2) /* USB Device Port Master Clock Automatic Disable on Suspend [AT91RM9200 only] */
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#define AT91CAP9_PMC_DDR (1 << 2) /* DDR Clock [AT91CAP9 revC only] */
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#define AT91RM9200_PMC_UHP (1 << 4) /* USB Host Port Clock [AT91RM9200 only] */
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#define AT91SAM926x_PMC_UHP (1 << 6) /* USB Host Port Clock [AT91SAM926x only] */
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#define AT91CAP9_PMC_UHP (1 << 6) /* USB Host Port Clock [AT91CAP9 only] */
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#define AT91SAM926x_PMC_UDP (1 << 7) /* USB Devcice Port Clock [AT91SAM926x only] */
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#define AT91_PMC_PCK0 (1 << 8) /* Programmable Clock 0 */
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#define AT91_PMC_PCK1 (1 << 9) /* Programmable Clock 1 */
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#define AT91_PMC_PCK2 (1 << 10) /* Programmable Clock 2 */
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#define AT91_PMC_PCK3 (1 << 11) /* Programmable Clock 3 */
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#define AT91_PMC_HCK0 (1 << 16) /* AHB Clock (USB host) [AT91SAM9261 only] */
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#define AT91_PMC_HCK1 (1 << 17) /* AHB Clock (LCD) [AT91SAM9261 only] */
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#define AT91_PMC_PCER (AT91_PMC + 0x10) /* Peripheral Clock Enable Register */
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#define AT91_PMC_PCDR (AT91_PMC + 0x14) /* Peripheral Clock Disable Register */
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#define AT91_PMC_PCSR (AT91_PMC + 0x18) /* Peripheral Clock Status Register */
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#define AT91_CKGR_UCKR (AT91_PMC + 0x1C) /* UTMI Clock Register [SAM9RL, CAP9] */
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#define AT91_PMC_UPLLEN (1 << 16) /* UTMI PLL Enable */
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#define AT91_PMC_UPLLCOUNT (0xf << 20) /* UTMI PLL Start-up Time */
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#define AT91_PMC_BIASEN (1 << 24) /* UTMI BIAS Enable */
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#define AT91_PMC_BIASCOUNT (0xf << 28) /* UTMI PLL Start-up Time */
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#define AT91_CKGR_MOR (AT91_PMC + 0x20) /* Main Oscillator Register [not on SAM9RL] */
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#define AT91_PMC_MOSCEN (1 << 0) /* Main Oscillator Enable */
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#define AT91_PMC_OSCBYPASS (1 << 1) /* Oscillator Bypass [SAM9x, CAP9] */
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#define AT91_PMC_OSCOUNT (0xff << 8) /* Main Oscillator Start-up Time */
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#define AT91_CKGR_MCFR (AT91_PMC + 0x24) /* Main Clock Frequency Register */
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#define AT91_PMC_MAINF (0xffff << 0) /* Main Clock Frequency */
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#define AT91_PMC_MAINRDY (1 << 16) /* Main Clock Ready */
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#define AT91_CKGR_PLLAR (AT91_PMC + 0x28) /* PLL A Register */
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#define AT91_CKGR_PLLBR (AT91_PMC + 0x2c) /* PLL B Register */
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#define AT91_PMC_DIV (0xff << 0) /* Divider */
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#define AT91_PMC_PLLCOUNT (0x3f << 8) /* PLL Counter */
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#define AT91_PMC_OUT (3 << 14) /* PLL Clock Frequency Range */
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#define AT91_PMC_MUL (0x7ff << 16) /* PLL Multiplier */
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#define AT91_PMC_USBDIV (3 << 28) /* USB Divisor (PLLB only) */
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#define AT91_PMC_USBDIV_1 (0 << 28)
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#define AT91_PMC_USBDIV_2 (1 << 28)
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#define AT91_PMC_USBDIV_4 (2 << 28)
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#define AT91_PMC_USB96M (1 << 28) /* Divider by 2 Enable (PLLB only) */
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#define AT91_PMC_MCKR (AT91_PMC + 0x30) /* Master Clock Register */
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#define AT91_PMC_CSS (3 << 0) /* Master Clock Selection */
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#define AT91_PMC_CSS_SLOW (0 << 0)
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#define AT91_PMC_CSS_MAIN (1 << 0)
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#define AT91_PMC_CSS_PLLA (2 << 0)
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#define AT91_PMC_CSS_PLLB (3 << 0)
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#define AT91_PMC_PRES (7 << 2) /* Master Clock Prescaler */
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#define AT91_PMC_PRES_1 (0 << 2)
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#define AT91_PMC_PRES_2 (1 << 2)
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#define AT91_PMC_PRES_4 (2 << 2)
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#define AT91_PMC_PRES_8 (3 << 2)
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#define AT91_PMC_PRES_16 (4 << 2)
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#define AT91_PMC_PRES_32 (5 << 2)
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#define AT91_PMC_PRES_64 (6 << 2)
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#define AT91_PMC_MDIV (3 << 8) /* Master Clock Division */
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#define AT91RM9200_PMC_MDIV_1 (0 << 8) /* [AT91RM9200 only] */
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#define AT91RM9200_PMC_MDIV_2 (1 << 8)
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#define AT91RM9200_PMC_MDIV_3 (2 << 8)
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#define AT91RM9200_PMC_MDIV_4 (3 << 8)
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#define AT91SAM9_PMC_MDIV_1 (0 << 8) /* [SAM9,CAP9 only] */
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#define AT91SAM9_PMC_MDIV_2 (1 << 8)
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#define AT91SAM9_PMC_MDIV_4 (2 << 8)
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#define AT91SAM9_PMC_MDIV_6 (3 << 8)
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#define AT91_PMC_PDIV (1 << 12) /* Processor Clock Division [some SAM9 only] */
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#define AT91_PMC_PDIV_1 (0 << 12)
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#define AT91_PMC_PDIV_2 (1 << 12)
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#define AT91_PMC_PCKR(n) (AT91_PMC + 0x40 + ((n) * 4)) /* Programmable Clock 0-3 Registers */
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#define AT91_PMC_IER (AT91_PMC + 0x60) /* Interrupt Enable Register */
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#define AT91_PMC_IDR (AT91_PMC + 0x64) /* Interrupt Disable Register */
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#define AT91_PMC_SR (AT91_PMC + 0x68) /* Status Register */
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#define AT91_PMC_MOSCS (1 << 0) /* MOSCS Flag */
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#define AT91_PMC_LOCKA (1 << 1) /* PLLA Lock */
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#define AT91_PMC_LOCKB (1 << 2) /* PLLB Lock */
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#define AT91_PMC_MCKRDY (1 << 3) /* Master Clock */
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#define AT91_PMC_LOCKU (1 << 6) /* UPLL Lock [AT91CAP9 only] */
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#define AT91_PMC_OSCSEL (1 << 7) /* Slow Clock Oscillator [AT91CAP9 revC only] */
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#define AT91_PMC_PCK0RDY (1 << 8) /* Programmable Clock 0 */
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#define AT91_PMC_PCK1RDY (1 << 9) /* Programmable Clock 1 */
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#define AT91_PMC_PCK2RDY (1 << 10) /* Programmable Clock 2 */
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#define AT91_PMC_PCK3RDY (1 << 11) /* Programmable Clock 3 */
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#define AT91_PMC_IMR (AT91_PMC + 0x6c) /* Interrupt Mask Register */
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#define AT91_PMC_PROT (AT91_PMC + 0xe4) /* Protect Register [AT91CAP9 revC only] */
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#define AT91_PMC_PROTKEY 0x504d4301 /* Activation Code */
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#define AT91_PMC_VER (AT91_PMC + 0xfc) /* PMC Module Version [AT91CAP9 only] */
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#endif
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