mirror of
https://github.com/marqs85/ossc
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64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
//
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// Copyright (C) 2015-2016 Markus Hiienkari <mhiienka@niksula.hut.fi>
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//
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// This file is part of Open Source Scan Converter project.
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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 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#include <unistd.h>
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#include "flash.h"
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void __attribute__((noinline, flatten, __section__(".text_bram"))) flash_write_protect(flash_ctrl_dev *dev, int enable) {
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// Write enable
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dev->regs->flash_cmd_cfg = 0x00000006;
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dev->regs->flash_cmd_ctrl = 1;
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// Write status register
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dev->regs->flash_cmd_cfg = 0x00001001;
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dev->regs->flash_cmd_wrdata[0] = enable ? 0x0000005c : 0x00000000;
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dev->regs->flash_cmd_ctrl = 1;
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// Poll status register until write has completed
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while (1) {
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dev->regs->flash_cmd_cfg = 0x00001805;
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dev->regs->flash_cmd_ctrl = 1;
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if (!(dev->regs->flash_cmd_rddata[0] & (1<<0)))
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break;
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}
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// Write disable
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dev->regs->flash_cmd_cfg = 0x00000004;
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dev->regs->flash_cmd_ctrl = 1;
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}
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void __attribute__((noinline, flatten, __section__(".text_bram"))) flash_sector_erase(flash_ctrl_dev *dev, uint32_t addr) {
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// Write enable
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dev->regs->flash_cmd_cfg = 0x00000006;
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dev->regs->flash_cmd_ctrl = 1;
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// Sector erase
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dev->regs->flash_cmd_cfg = (dev->flash_size > 0x1000000) ? 0x000004DC : 0x000003D8;
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dev->regs->flash_cmd_addr = addr;
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dev->regs->flash_cmd_ctrl = 1;
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// Poll status register until write has completed
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while (1) {
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dev->regs->flash_cmd_cfg = 0x00001805;
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dev->regs->flash_cmd_ctrl = 1;
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if (!(dev->regs->flash_cmd_rddata[0] & (1<<0)))
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break;
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}
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}
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